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Finding the Fourth Proportional to 9,805.80, 14,687.10 and 8,711.40

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Solution

The fourth proportional to 9,805.80, 14,687.10 and 8,711.40 is: 13,047.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,805.80 : 14,687.10 = 8,711.40 : x
  2. Step 2: Convert to fraction form
    9,805.80/14,687.10 = 8,711.40/x
  3. Step 3: Cross multiply
    9,805.80x = 14,687.10 × 8,711.40
  4. Step 4: Simplify right side
    9,805.80x = 127,945,202.94
  5. Step 5: Solve for x
    x = 127,945,202.94/9,805.80
  6. Step 6: Final answer
    x = 13,047.91

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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.