Home / 42,153.90-63,235.10-13,689.66

Finding the Fourth Proportional to 42,153.90, 63,235.10 and 13,689.66

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Solution

The fourth proportional to 42,153.90, 63,235.10 and 13,689.66 is: 20,535.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,153.90 : 63,235.10 = 13,689.66 : x
  2. Step 2: Convert to fraction form
    42,153.90/63,235.10 = 13,689.66/x
  3. Step 3: Cross multiply
    42,153.90x = 63,235.10 × 13,689.66
  4. Step 4: Simplify right side
    42,153.90x = 865,667,019.07
  5. Step 5: Solve for x
    x = 865,667,019.07/42,153.90
  6. Step 6: Final answer
    x = 20,535.87

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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.