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Finding the Fourth Proportional to 7,431.60, 11,147.40 and 7,358.70

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Solution

The fourth proportional to 7,431.60, 11,147.40 and 7,358.70 is: 11,038.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,431.60 : 11,147.40 = 7,358.70 : x
  2. Step 2: Convert to fraction form
    7,431.60/11,147.40 = 7,358.70/x
  3. Step 3: Cross multiply
    7,431.60x = 11,147.40 × 7,358.70
  4. Step 4: Simplify right side
    7,431.60x = 82,030,372.38
  5. Step 5: Solve for x
    x = 82,030,372.38/7,431.60
  6. Step 6: Final answer
    x = 11,038.05

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Half scale
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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.