Home / 10,218.40-15,327.60-8,663.20

Finding the Fourth Proportional to 10,218.40, 15,327.60 and 8,663.20

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Solution

The fourth proportional to 10,218.40, 15,327.60 and 8,663.20 is: 12,994.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,218.40 : 15,327.60 = 8,663.20 : x
  2. Step 2: Convert to fraction form
    10,218.40/15,327.60 = 8,663.20/x
  3. Step 3: Cross multiply
    10,218.40x = 15,327.60 × 8,663.20
  4. Step 4: Simplify right side
    10,218.40x = 132,786,064.32
  5. Step 5: Solve for x
    x = 132,786,064.32/10,218.40
  6. Step 6: Final answer
    x = 12,994.80

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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.