Home / 10,999.20-16,498.80-6,614.40

Finding the Fourth Proportional to 10,999.20, 16,498.80 and 6,614.40

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Solution

The fourth proportional to 10,999.20, 16,498.80 and 6,614.40 is: 9,921.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,999.20 : 16,498.80 = 6,614.40 : x
  2. Step 2: Convert to fraction form
    10,999.20/16,498.80 = 6,614.40/x
  3. Step 3: Cross multiply
    10,999.20x = 16,498.80 × 6,614.40
  4. Step 4: Simplify right side
    10,999.20x = 109,129,662.72
  5. Step 5: Solve for x
    x = 109,129,662.72/10,999.20
  6. Step 6: Final answer
    x = 9,921.60

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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.