Home / 10,789.20-14,871.60-9,331.20

Finding the Fourth Proportional to 10,789.20, 14,871.60 and 9,331.20

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Solution

The fourth proportional to 10,789.20, 14,871.60 and 9,331.20 is: 12,861.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,789.20 : 14,871.60 = 9,331.20 : x
  2. Step 2: Convert to fraction form
    10,789.20/14,871.60 = 9,331.20/x
  3. Step 3: Cross multiply
    10,789.20x = 14,871.60 × 9,331.20
  4. Step 4: Simplify right side
    10,789.20x = 138,769,873.92
  5. Step 5: Solve for x
    x = 138,769,873.92/10,789.20
  6. Step 6: Final answer
    x = 12,861.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.