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Finding the Fourth Proportional to 8,386.74, 12,572.55 and 3,188.88

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Solution

The fourth proportional to 8,386.74, 12,572.55 and 3,188.88 is: 4,780.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,386.74 : 12,572.55 = 3,188.88 : x
  2. Step 2: Convert to fraction form
    8,386.74/12,572.55 = 3,188.88/x
  3. Step 3: Cross multiply
    8,386.74x = 12,572.55 × 3,188.88
  4. Step 4: Simplify right side
    8,386.74x = 40,092,353.24
  5. Step 5: Solve for x
    x = 40,092,353.24/8,386.74
  6. Step 6: Final answer
    x = 4,780.45

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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.