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Finding the Fourth Proportional to 15,560.92, 21,475.88 and 8,847.55

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Solution

The fourth proportional to 15,560.92, 21,475.88 and 8,847.55 is: 12,210.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,560.92 : 21,475.88 = 8,847.55 : x
  2. Step 2: Convert to fraction form
    15,560.92/21,475.88 = 8,847.55/x
  3. Step 3: Cross multiply
    15,560.92x = 21,475.88 × 8,847.55
  4. Step 4: Simplify right side
    15,560.92x = 190,008,890.52
  5. Step 5: Solve for x
    x = 190,008,890.52/15,560.92
  6. Step 6: Final answer
    x = 12,210.65

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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.