Home / 42,167.40-63,251.10-21,172.20

Finding the Fourth Proportional to 42,167.40, 63,251.10 and 21,172.20

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Solution

The fourth proportional to 42,167.40, 63,251.10 and 21,172.20 is: 31,758.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,167.40 : 63,251.10 = 21,172.20 : x
  2. Step 2: Convert to fraction form
    42,167.40/63,251.10 = 21,172.20/x
  3. Step 3: Cross multiply
    42,167.40x = 63,251.10 × 21,172.20
  4. Step 4: Simplify right side
    42,167.40x = 1,339,164,939.42
  5. Step 5: Solve for x
    x = 1,339,164,939.42/42,167.40
  6. Step 6: Final answer
    x = 31,758.30

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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.