Home / 20,147.39-30,220.16-7,000.79

Finding the Fourth Proportional to 20,147.39, 30,220.16 and 7,000.79

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Solution

The fourth proportional to 20,147.39, 30,220.16 and 7,000.79 is: 10,500.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.39 : 30,220.16 = 7,000.79 : x
  2. Step 2: Convert to fraction form
    20,147.39/30,220.16 = 7,000.79/x
  3. Step 3: Cross multiply
    20,147.39x = 30,220.16 × 7,000.79
  4. Step 4: Simplify right side
    20,147.39x = 211,564,807.82
  5. Step 5: Solve for x
    x = 211,564,807.82/20,147.39
  6. Step 6: Final answer
    x = 10,500.86

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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.