Home / 15,204.68-20,982.90-8,490.20

Finding the Fourth Proportional to 15,204.68, 20,982.90 and 8,490.20

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Solution

The fourth proportional to 15,204.68, 20,982.90 and 8,490.20 is: 11,716.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,204.68 : 20,982.90 = 8,490.20 : x
  2. Step 2: Convert to fraction form
    15,204.68/20,982.90 = 8,490.20/x
  3. Step 3: Cross multiply
    15,204.68x = 20,982.90 × 8,490.20
  4. Step 4: Simplify right side
    15,204.68x = 178,149,017.58
  5. Step 5: Solve for x
    x = 178,149,017.58/15,204.68
  6. Step 6: Final answer
    x = 11,716.72

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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.