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Finding the Fourth Proportional to 40,221.40, 60,331.80 and 12,141.40

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Solution

The fourth proportional to 40,221.40, 60,331.80 and 12,141.40 is: 18,212.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,221.40 : 60,331.80 = 12,141.40 : x
  2. Step 2: Convert to fraction form
    40,221.40/60,331.80 = 12,141.40/x
  3. Step 3: Cross multiply
    40,221.40x = 60,331.80 × 12,141.40
  4. Step 4: Simplify right side
    40,221.40x = 732,512,516.52
  5. Step 5: Solve for x
    x = 732,512,516.52/40,221.40
  6. Step 6: Final answer
    x = 18,212.01

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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.