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Finding the Fourth Proportional to 12,472.77, 18,712.72 and 4,158.22

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Solution

The fourth proportional to 12,472.77, 18,712.72 and 4,158.22 is: 6,238.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,472.77 : 18,712.72 = 4,158.22 : x
  2. Step 2: Convert to fraction form
    12,472.77/18,712.72 = 4,158.22/x
  3. Step 3: Cross multiply
    12,472.77x = 18,712.72 × 4,158.22
  4. Step 4: Simplify right side
    12,472.77x = 77,811,600.06
  5. Step 5: Solve for x
    x = 77,811,600.06/12,472.77
  6. Step 6: Final answer
    x = 6,238.52

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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.