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Finding the Fourth Proportional to 10,643.87, 15,952.09 and 9,979.56

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Solution

The fourth proportional to 10,643.87, 15,952.09 and 9,979.56 is: 14,956.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,643.87 : 15,952.09 = 9,979.56 : x
  2. Step 2: Convert to fraction form
    10,643.87/15,952.09 = 9,979.56/x
  3. Step 3: Cross multiply
    10,643.87x = 15,952.09 × 9,979.56
  4. Step 4: Simplify right side
    10,643.87x = 159,194,839.28
  5. Step 5: Solve for x
    x = 159,194,839.28/10,643.87
  6. Step 6: Final answer
    x = 14,956.48

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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.