Home / 10,902.81-15,017.22-8,380.10

Finding the Fourth Proportional to 10,902.81, 15,017.22 and 8,380.10

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Solution

The fourth proportional to 10,902.81, 15,017.22 and 8,380.10 is: 11,542.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,902.81 : 15,017.22 = 8,380.10 : x
  2. Step 2: Convert to fraction form
    10,902.81/15,017.22 = 8,380.10/x
  3. Step 3: Cross multiply
    10,902.81x = 15,017.22 × 8,380.10
  4. Step 4: Simplify right side
    10,902.81x = 125,845,805.32
  5. Step 5: Solve for x
    x = 125,845,805.32/10,902.81
  6. Step 6: Final answer
    x = 11,542.51

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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.