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Finding the Fourth Proportional to 10,999.80, 15,162.03 and 8,605.71

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Solution

The fourth proportional to 10,999.80, 15,162.03 and 8,605.71 is: 11,862.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,999.80 : 15,162.03 = 8,605.71 : x
  2. Step 2: Convert to fraction form
    10,999.80/15,162.03 = 8,605.71/x
  3. Step 3: Cross multiply
    10,999.80x = 15,162.03 × 8,605.71
  4. Step 4: Simplify right side
    10,999.80x = 130,480,033.19
  5. Step 5: Solve for x
    x = 130,480,033.19/10,999.80
  6. Step 6: Final answer
    x = 11,862.04

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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.