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Finding the Fourth Proportional to 7,490.48, 11,235.71 and 7,028.78

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Solution

The fourth proportional to 7,490.48, 11,235.71 and 7,028.78 is: 10,543.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,490.48 : 11,235.71 = 7,028.78 : x
  2. Step 2: Convert to fraction form
    7,490.48/11,235.71 = 7,028.78/x
  3. Step 3: Cross multiply
    7,490.48x = 11,235.71 × 7,028.78
  4. Step 4: Simplify right side
    7,490.48x = 78,973,295.13
  5. Step 5: Solve for x
    x = 78,973,295.13/7,490.48
  6. Step 6: Final answer
    x = 10,543.16

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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.