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Finding the Fourth Proportional to 14,200.80, 21,301.20 and 6,400.50

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Solution

The fourth proportional to 14,200.80, 21,301.20 and 6,400.50 is: 9,600.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,200.80 : 21,301.20 = 6,400.50 : x
  2. Step 2: Convert to fraction form
    14,200.80/21,301.20 = 6,400.50/x
  3. Step 3: Cross multiply
    14,200.80x = 21,301.20 × 6,400.50
  4. Step 4: Simplify right side
    14,200.80x = 136,338,330.60
  5. Step 5: Solve for x
    x = 136,338,330.60/14,200.80
  6. Step 6: Final answer
    x = 9,600.75

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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.