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Finding the Fourth Proportional to 39,959, 59,939.60 and 12,257

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Solution

The fourth proportional to 39,959, 59,939.60 and 12,257 is: 18,385.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,959 : 59,939.60 = 12,257 : x
  2. Step 2: Convert to fraction form
    39,959/59,939.60 = 12,257/x
  3. Step 3: Cross multiply
    39,959x = 59,939.60 × 12,257
  4. Step 4: Simplify right side
    39,959x = 734,679,677.20
  5. Step 5: Solve for x
    x = 734,679,677.20/39,959
  6. Step 6: Final answer
    x = 18,385.84

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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.