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Finding the Fourth Proportional to 38,436.80, 57,655.20 and 17,700.80

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Solution

The fourth proportional to 38,436.80, 57,655.20 and 17,700.80 is: 26,551.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,436.80 : 57,655.20 = 17,700.80 : x
  2. Step 2: Convert to fraction form
    38,436.80/57,655.20 = 17,700.80/x
  3. Step 3: Cross multiply
    38,436.80x = 57,655.20 × 17,700.80
  4. Step 4: Simplify right side
    38,436.80x = 1,020,543,164.16
  5. Step 5: Solve for x
    x = 1,020,543,164.16/38,436.80
  6. Step 6: Final answer
    x = 26,551.20

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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.