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Finding the Fourth Proportional to 8,475.44, 12,689.67 and 6,389.12

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Solution

The fourth proportional to 8,475.44, 12,689.67 and 6,389.12 is: 9,565.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,475.44 : 12,689.67 = 6,389.12 : x
  2. Step 2: Convert to fraction form
    8,475.44/12,689.67 = 6,389.12/x
  3. Step 3: Cross multiply
    8,475.44x = 12,689.67 × 6,389.12
  4. Step 4: Simplify right side
    8,475.44x = 81,075,824.39
  5. Step 5: Solve for x
    x = 81,075,824.39/8,475.44
  6. Step 6: Final answer
    x = 9,565.97

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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.