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Finding the Fourth Proportional to 8,475.52, 11,687.06 and 7,130.78

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Solution

The fourth proportional to 8,475.52, 11,687.06 and 7,130.78 is: 9,832.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,475.52 : 11,687.06 = 7,130.78 : x
  2. Step 2: Convert to fraction form
    8,475.52/11,687.06 = 7,130.78/x
  3. Step 3: Cross multiply
    8,475.52x = 11,687.06 × 7,130.78
  4. Step 4: Simplify right side
    8,475.52x = 83,337,853.71
  5. Step 5: Solve for x
    x = 83,337,853.71/8,475.52
  6. Step 6: Final answer
    x = 9,832.77

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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.