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Finding the Fourth Proportional to 42,625.80, 63,938.70 and 13,043.70

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Solution

The fourth proportional to 42,625.80, 63,938.70 and 13,043.70 is: 19,565.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,625.80 : 63,938.70 = 13,043.70 : x
  2. Step 2: Convert to fraction form
    42,625.80/63,938.70 = 13,043.70/x
  3. Step 3: Cross multiply
    42,625.80x = 63,938.70 × 13,043.70
  4. Step 4: Simplify right side
    42,625.80x = 833,997,221.19
  5. Step 5: Solve for x
    x = 833,997,221.19/42,625.80
  6. Step 6: Final answer
    x = 19,565.55

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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.