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Finding the Fourth Proportional to 8,690.22, 12,001.01 and 7,423.88

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Solution

The fourth proportional to 8,690.22, 12,001.01 and 7,423.88 is: 10,252.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.22 : 12,001.01 = 7,423.88 : x
  2. Step 2: Convert to fraction form
    8,690.22/12,001.01 = 7,423.88/x
  3. Step 3: Cross multiply
    8,690.22x = 12,001.01 × 7,423.88
  4. Step 4: Simplify right side
    8,690.22x = 89,093,960.99
  5. Step 5: Solve for x
    x = 89,093,960.99/8,690.22
  6. Step 6: Final answer
    x = 10,252.21

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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.