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Finding the Fourth Proportional to 8,999.98, 13,480.24 and 7,422.20

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Solution

The fourth proportional to 8,999.98, 13,480.24 and 7,422.20 is: 11,117.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.98 : 13,480.24 = 7,422.20 : x
  2. Step 2: Convert to fraction form
    8,999.98/13,480.24 = 7,422.20/x
  3. Step 3: Cross multiply
    8,999.98x = 13,480.24 × 7,422.20
  4. Step 4: Simplify right side
    8,999.98x = 100,053,037.33
  5. Step 5: Solve for x
    x = 100,053,037.33/8,999.98
  6. Step 6: Final answer
    x = 11,117.03

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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.