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Finding the Fourth Proportional to 10,999.10, 16,498.65 and 7,281.20

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Solution

The fourth proportional to 10,999.10, 16,498.65 and 7,281.20 is: 10,921.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,999.10 : 16,498.65 = 7,281.20 : x
  2. Step 2: Convert to fraction form
    10,999.10/16,498.65 = 7,281.20/x
  3. Step 3: Cross multiply
    10,999.10x = 16,498.65 × 7,281.20
  4. Step 4: Simplify right side
    10,999.10x = 120,129,970.38
  5. Step 5: Solve for x
    x = 120,129,970.38/10,999.10
  6. Step 6: Final answer
    x = 10,921.80

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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.