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Finding the Fourth Proportional to 38,476.20, 57,681.90 and 20,008.20

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Solution

The fourth proportional to 38,476.20, 57,681.90 and 20,008.20 is: 29,995.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,476.20 : 57,681.90 = 20,008.20 : x
  2. Step 2: Convert to fraction form
    38,476.20/57,681.90 = 20,008.20/x
  3. Step 3: Cross multiply
    38,476.20x = 57,681.90 × 20,008.20
  4. Step 4: Simplify right side
    38,476.20x = 1,154,110,991.58
  5. Step 5: Solve for x
    x = 1,154,110,991.58/38,476.20
  6. Step 6: Final answer
    x = 29,995.45

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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.