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Finding the Fourth Proportional to 7,521.30, 11,281.95 and 7,391.70

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Solution

The fourth proportional to 7,521.30, 11,281.95 and 7,391.70 is: 11,087.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,521.30 : 11,281.95 = 7,391.70 : x
  2. Step 2: Convert to fraction form
    7,521.30/11,281.95 = 7,391.70/x
  3. Step 3: Cross multiply
    7,521.30x = 11,281.95 × 7,391.70
  4. Step 4: Simplify right side
    7,521.30x = 83,392,789.82
  5. Step 5: Solve for x
    x = 83,392,789.82/7,521.30
  6. Step 6: Final answer
    x = 11,087.55

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Double scale
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Similar ratio
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1.5x scale

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.