Home / 15,022.12-20,731.17-8,307.75

Finding the Fourth Proportional to 15,022.12, 20,731.17 and 8,307.75

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Solution

The fourth proportional to 15,022.12, 20,731.17 and 8,307.75 is: 11,465.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,022.12 : 20,731.17 = 8,307.75 : x
  2. Step 2: Convert to fraction form
    15,022.12/20,731.17 = 8,307.75/x
  3. Step 3: Cross multiply
    15,022.12x = 20,731.17 × 8,307.75
  4. Step 4: Simplify right side
    15,022.12x = 172,229,299.83
  5. Step 5: Solve for x
    x = 172,229,299.83/15,022.12
  6. Step 6: Final answer
    x = 11,465.05

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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.