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Finding the Fourth Proportional to 42,008.65, 63,025.28 and 12,427.28

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Solution

The fourth proportional to 42,008.65, 63,025.28 and 12,427.28 is: 18,644.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,008.65 : 63,025.28 = 12,427.28 : x
  2. Step 2: Convert to fraction form
    42,008.65/63,025.28 = 12,427.28/x
  3. Step 3: Cross multiply
    42,008.65x = 63,025.28 × 12,427.28
  4. Step 4: Simplify right side
    42,008.65x = 783,232,801.64
  5. Step 5: Solve for x
    x = 783,232,801.64/42,008.65
  6. Step 6: Final answer
    x = 18,644.56

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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.