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Finding the Fourth Proportional to 15,164.76, 20,925.90 and 9,116.76

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Solution

The fourth proportional to 15,164.76, 20,925.90 and 9,116.76 is: 12,580.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,164.76 : 20,925.90 = 9,116.76 : x
  2. Step 2: Convert to fraction form
    15,164.76/20,925.90 = 9,116.76/x
  3. Step 3: Cross multiply
    15,164.76x = 20,925.90 × 9,116.76
  4. Step 4: Simplify right side
    15,164.76x = 190,776,408.08
  5. Step 5: Solve for x
    x = 190,776,408.08/15,164.76
  6. Step 6: Final answer
    x = 12,580.25

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Half scale
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Double scale
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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.