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Finding the Fourth Proportional to 7,141.80, 10,712.70 and 7,020.30

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Solution

The fourth proportional to 7,141.80, 10,712.70 and 7,020.30 is: 10,530.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,141.80 : 10,712.70 = 7,020.30 : x
  2. Step 2: Convert to fraction form
    7,141.80/10,712.70 = 7,020.30/x
  3. Step 3: Cross multiply
    7,141.80x = 10,712.70 × 7,020.30
  4. Step 4: Simplify right side
    7,141.80x = 75,206,367.81
  5. Step 5: Solve for x
    x = 75,206,367.81/7,141.80
  6. Step 6: Final answer
    x = 10,530.45

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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.