Home / 12,200.76-18,301.14-9,986.40

Finding the Fourth Proportional to 12,200.76, 18,301.14 and 9,986.40

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Solution

The fourth proportional to 12,200.76, 18,301.14 and 9,986.40 is: 14,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,200.76 : 18,301.14 = 9,986.40 : x
  2. Step 2: Convert to fraction form
    12,200.76/18,301.14 = 9,986.40/x
  3. Step 3: Cross multiply
    12,200.76x = 18,301.14 × 9,986.40
  4. Step 4: Simplify right side
    12,200.76x = 182,762,504.50
  5. Step 5: Solve for x
    x = 182,762,504.50/12,200.76
  6. Step 6: Final answer
    x = 14,979.60

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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.