Home / 12,909.79-19,397.13-8,231.95

Finding the Fourth Proportional to 12,909.79, 19,397.13 and 8,231.95

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Solution

The fourth proportional to 12,909.79, 19,397.13 and 8,231.95 is: 12,368.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.79 : 19,397.13 = 8,231.95 : x
  2. Step 2: Convert to fraction form
    12,909.79/19,397.13 = 8,231.95/x
  3. Step 3: Cross multiply
    12,909.79x = 19,397.13 × 8,231.95
  4. Step 4: Simplify right side
    12,909.79x = 159,676,204.30
  5. Step 5: Solve for x
    x = 159,676,204.30/12,909.79
  6. Step 6: Final answer
    x = 12,368.61

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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.