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Finding the Fourth Proportional to 8,487.95, 11,713.50 and 5,130.17

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Solution

The fourth proportional to 8,487.95, 11,713.50 and 5,130.17 is: 7,079.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,487.95 : 11,713.50 = 5,130.17 : x
  2. Step 2: Convert to fraction form
    8,487.95/11,713.50 = 5,130.17/x
  3. Step 3: Cross multiply
    8,487.95x = 11,713.50 × 5,130.17
  4. Step 4: Simplify right side
    8,487.95x = 60,092,162.08
  5. Step 5: Solve for x
    x = 60,092,162.08/8,487.95
  6. Step 6: Final answer
    x = 7,079.70

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1.5x scale

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.