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Finding the Fourth Proportional to 9,999.20, 14,998.80 and 9,572.60

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Solution

The fourth proportional to 9,999.20, 14,998.80 and 9,572.60 is: 14,358.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,999.20 : 14,998.80 = 9,572.60 : x
  2. Step 2: Convert to fraction form
    9,999.20/14,998.80 = 9,572.60/x
  3. Step 3: Cross multiply
    9,999.20x = 14,998.80 × 9,572.60
  4. Step 4: Simplify right side
    9,999.20x = 143,577,512.88
  5. Step 5: Solve for x
    x = 143,577,512.88/9,999.20
  6. Step 6: Final answer
    x = 14,358.90

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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.