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Finding the Fourth Proportional to 9,980.70, 15,003.45 and 7,079.10

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Solution

The fourth proportional to 9,980.70, 15,003.45 and 7,079.10 is: 10,641.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,980.70 : 15,003.45 = 7,079.10 : x
  2. Step 2: Convert to fraction form
    9,980.70/15,003.45 = 7,079.10/x
  3. Step 3: Cross multiply
    9,980.70x = 15,003.45 × 7,079.10
  4. Step 4: Simplify right side
    9,980.70x = 106,210,922.90
  5. Step 5: Solve for x
    x = 106,210,922.90/9,980.70
  6. Step 6: Final answer
    x = 10,641.63

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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.