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Finding the Fourth Proportional to 20,331.76, 30,476.76 and 11,547.92

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Solution

The fourth proportional to 20,331.76, 30,476.76 and 11,547.92 is: 17,310.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.76 : 30,476.76 = 11,547.92 : x
  2. Step 2: Convert to fraction form
    20,331.76/30,476.76 = 11,547.92/x
  3. Step 3: Cross multiply
    20,331.76x = 30,476.76 × 11,547.92
  4. Step 4: Simplify right side
    20,331.76x = 351,943,186.34
  5. Step 5: Solve for x
    x = 351,943,186.34/20,331.76
  6. Step 6: Final answer
    x = 17,310.02

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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.