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Finding the Fourth Proportional to 8,488.90, 11,724.90 and 7,423.95

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Solution

The fourth proportional to 8,488.90, 11,724.90 and 7,423.95 is: 10,253.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,488.90 : 11,724.90 = 7,423.95 : x
  2. Step 2: Convert to fraction form
    8,488.90/11,724.90 = 7,423.95/x
  3. Step 3: Cross multiply
    8,488.90x = 11,724.90 × 7,423.95
  4. Step 4: Simplify right side
    8,488.90x = 87,045,129.24
  5. Step 5: Solve for x
    x = 87,045,129.24/8,488.90
  6. Step 6: Final answer
    x = 10,253.99

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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.