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Finding the Fourth Proportional to 39,978.38, 59,967.57 and 12,276.38

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Solution

The fourth proportional to 39,978.38, 59,967.57 and 12,276.38 is: 18,414.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,978.38 : 59,967.57 = 12,276.38 : x
  2. Step 2: Convert to fraction form
    39,978.38/59,967.57 = 12,276.38/x
  3. Step 3: Cross multiply
    39,978.38x = 59,967.57 × 12,276.38
  4. Step 4: Simplify right side
    39,978.38x = 736,184,377.16
  5. Step 5: Solve for x
    x = 736,184,377.16/39,978.38
  6. Step 6: Final answer
    x = 18,414.56

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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.