Home / 40,215.88-60,331.68-12,138.22

Finding the Fourth Proportional to 40,215.88, 60,331.68 and 12,138.22

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Solution

The fourth proportional to 40,215.88, 60,331.68 and 12,138.22 is: 18,209.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,215.88 : 60,331.68 = 12,138.22 : x
  2. Step 2: Convert to fraction form
    40,215.88/60,331.68 = 12,138.22/x
  3. Step 3: Cross multiply
    40,215.88x = 60,331.68 × 12,138.22
  4. Step 4: Simplify right side
    40,215.88x = 732,319,053.98
  5. Step 5: Solve for x
    x = 732,319,053.98/40,215.88
  6. Step 6: Final answer
    x = 18,209.70

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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.