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Finding the Fourth Proportional to 40,507.48, 60,764.46 and 12,429.64

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Solution

The fourth proportional to 40,507.48, 60,764.46 and 12,429.64 is: 18,645.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,507.48 : 60,764.46 = 12,429.64 : x
  2. Step 2: Convert to fraction form
    40,507.48/60,764.46 = 12,429.64/x
  3. Step 3: Cross multiply
    40,507.48x = 60,764.46 × 12,429.64
  4. Step 4: Simplify right side
    40,507.48x = 755,280,362.59
  5. Step 5: Solve for x
    x = 755,280,362.59/40,507.48
  6. Step 6: Final answer
    x = 18,645.45

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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.