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Finding the Fourth Proportional to 8,471.03, 12,690.71 and 7,555.91

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Solution

The fourth proportional to 8,471.03, 12,690.71 and 7,555.91 is: 11,319.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,471.03 : 12,690.71 = 7,555.91 : x
  2. Step 2: Convert to fraction form
    8,471.03/12,690.71 = 7,555.91/x
  3. Step 3: Cross multiply
    8,471.03x = 12,690.71 × 7,555.91
  4. Step 4: Simplify right side
    8,471.03x = 95,889,824.82
  5. Step 5: Solve for x
    x = 95,889,824.82/8,471.03
  6. Step 6: Final answer
    x = 11,319.74

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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.