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Finding the Fourth Proportional to 39,635.76, 54,700.80 and 21,734.25

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Solution

The fourth proportional to 39,635.76, 54,700.80 and 21,734.25 is: 29,995.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,635.76 : 54,700.80 = 21,734.25 : x
  2. Step 2: Convert to fraction form
    39,635.76/54,700.80 = 21,734.25/x
  3. Step 3: Cross multiply
    39,635.76x = 54,700.80 × 21,734.25
  4. Step 4: Simplify right side
    39,635.76x = 1,188,880,862.40
  5. Step 5: Solve for x
    x = 1,188,880,862.40/39,635.76
  6. Step 6: Final answer
    x = 29,995.16

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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.