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Finding the Fourth Proportional to 9,980.15, 13,772.85 and 5,503.97

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Solution

The fourth proportional to 9,980.15, 13,772.85 and 5,503.97 is: 7,595.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,980.15 : 13,772.85 = 5,503.97 : x
  2. Step 2: Convert to fraction form
    9,980.15/13,772.85 = 5,503.97/x
  3. Step 3: Cross multiply
    9,980.15x = 13,772.85 × 5,503.97
  4. Step 4: Simplify right side
    9,980.15x = 75,805,353.21
  5. Step 5: Solve for x
    x = 75,805,353.21/9,980.15
  6. Step 6: Final answer
    x = 7,595.61

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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.