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Finding the Fourth Proportional to 18,999.84, 28,499.76 and 12,053.28

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Solution

The fourth proportional to 18,999.84, 28,499.76 and 12,053.28 is: 18,079.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.84 : 28,499.76 = 12,053.28 : x
  2. Step 2: Convert to fraction form
    18,999.84/28,499.76 = 12,053.28/x
  3. Step 3: Cross multiply
    18,999.84x = 28,499.76 × 12,053.28
  4. Step 4: Simplify right side
    18,999.84x = 343,515,587.21
  5. Step 5: Solve for x
    x = 343,515,587.21/18,999.84
  6. Step 6: Final answer
    x = 18,079.92

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.