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Finding the Fourth Proportional to 10,378.74, 15,568.11 and 8,891.58

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Solution

The fourth proportional to 10,378.74, 15,568.11 and 8,891.58 is: 13,337.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,378.74 : 15,568.11 = 8,891.58 : x
  2. Step 2: Convert to fraction form
    10,378.74/15,568.11 = 8,891.58/x
  3. Step 3: Cross multiply
    10,378.74x = 15,568.11 × 8,891.58
  4. Step 4: Simplify right side
    10,378.74x = 138,425,095.51
  5. Step 5: Solve for x
    x = 138,425,095.51/10,378.74
  6. Step 6: Final answer
    x = 13,337.37

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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.