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Finding the Fourth Proportional to 39,713.79, 54,805.02 and 21,808.80

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Solution

The fourth proportional to 39,713.79, 54,805.02 and 21,808.80 is: 30,096.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,713.79 : 54,805.02 = 21,808.80 : x
  2. Step 2: Convert to fraction form
    39,713.79/54,805.02 = 21,808.80/x
  3. Step 3: Cross multiply
    39,713.79x = 54,805.02 × 21,808.80
  4. Step 4: Simplify right side
    39,713.79x = 1,195,231,720.18
  5. Step 5: Solve for x
    x = 1,195,231,720.18/39,713.79
  6. Step 6: Final answer
    x = 30,096.14

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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.