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Finding the Fourth Proportional to 15,891.93, 21,920.90 and 10,234.08

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Solution

The fourth proportional to 15,891.93, 21,920.90 and 10,234.08 is: 14,116.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,891.93 : 21,920.90 = 10,234.08 : x
  2. Step 2: Convert to fraction form
    15,891.93/21,920.90 = 10,234.08/x
  3. Step 3: Cross multiply
    15,891.93x = 21,920.90 × 10,234.08
  4. Step 4: Simplify right side
    15,891.93x = 224,340,193.10
  5. Step 5: Solve for x
    x = 224,340,193.10/15,891.93
  6. Step 6: Final answer
    x = 14,116.61

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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.