Home / 12,642.55-18,966.05-4,320.61

Finding the Fourth Proportional to 12,642.55, 18,966.05 and 4,320.61

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Solution

The fourth proportional to 12,642.55, 18,966.05 and 4,320.61 is: 6,481.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642.55 : 18,966.05 = 4,320.61 : x
  2. Step 2: Convert to fraction form
    12,642.55/18,966.05 = 4,320.61/x
  3. Step 3: Cross multiply
    12,642.55x = 18,966.05 × 4,320.61
  4. Step 4: Simplify right side
    12,642.55x = 81,944,905.29
  5. Step 5: Solve for x
    x = 81,944,905.29/12,642.55
  6. Step 6: Final answer
    x = 6,481.68

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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.