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Finding the Fourth Proportional to 10,999.90, 16,499.85 and 6,615.10

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Solution

The fourth proportional to 10,999.90, 16,499.85 and 6,615.10 is: 9,922.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,999.90 : 16,499.85 = 6,615.10 : x
  2. Step 2: Convert to fraction form
    10,999.90/16,499.85 = 6,615.10/x
  3. Step 3: Cross multiply
    10,999.90x = 16,499.85 × 6,615.10
  4. Step 4: Simplify right side
    10,999.90x = 109,148,157.74
  5. Step 5: Solve for x
    x = 109,148,157.74/10,999.90
  6. Step 6: Final answer
    x = 9,922.65

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Half scale
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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.