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Finding the Fourth Proportional to 7,423.70, 11,135.55 and 7,059.20

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Solution

The fourth proportional to 7,423.70, 11,135.55 and 7,059.20 is: 10,588.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,423.70 : 11,135.55 = 7,059.20 : x
  2. Step 2: Convert to fraction form
    7,423.70/11,135.55 = 7,059.20/x
  3. Step 3: Cross multiply
    7,423.70x = 11,135.55 × 7,059.20
  4. Step 4: Simplify right side
    7,423.70x = 78,608,074.56
  5. Step 5: Solve for x
    x = 78,608,074.56/7,423.70
  6. Step 6: Final answer
    x = 10,588.80

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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.