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Finding the Fourth Proportional to 20,641.84, 28,484.88 and 11,210.16

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Solution

The fourth proportional to 20,641.84, 28,484.88 and 11,210.16 is: 15,469.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.84 : 28,484.88 = 11,210.16 : x
  2. Step 2: Convert to fraction form
    20,641.84/28,484.88 = 11,210.16/x
  3. Step 3: Cross multiply
    20,641.84x = 28,484.88 × 11,210.16
  4. Step 4: Simplify right side
    20,641.84x = 319,320,062.38
  5. Step 5: Solve for x
    x = 319,320,062.38/20,641.84
  6. Step 6: Final answer
    x = 15,469.55

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Half scale
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Double scale
Find fourth proportional to 20,642.84, 28,486.26 and 11,211.16
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.