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Finding the Fourth Proportional to 12,687,658.13, 17,508,748.50 and 6,886,315.28

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Solution

The fourth proportional to 12,687,658.13, 17,508,748.50 and 6,886,315.28 is: 9,502,995.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687,658.13 : 17,508,748.50 = 6,886,315.28 : x
  2. Step 2: Convert to fraction form
    12,687,658.13/17,508,748.50 = 6,886,315.28/x
  3. Step 3: Cross multiply
    12,687,658.13x = 17,508,748.50 × 6,886,315.28
  4. Step 4: Simplify right side
    12,687,658.13x = 120,570,762,329,227.08
  5. Step 5: Solve for x
    x = 120,570,762,329,227.08/12,687,658.13
  6. Step 6: Final answer
    x = 9,502,995.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.