Home / 15,778.28-21,774.06-8,704.69

Finding the Fourth Proportional to 15,778.28, 21,774.06 and 8,704.69

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Solution

The fourth proportional to 15,778.28, 21,774.06 and 8,704.69 is: 12,012.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,778.28 : 21,774.06 = 8,704.69 : x
  2. Step 2: Convert to fraction form
    15,778.28/21,774.06 = 8,704.69/x
  3. Step 3: Cross multiply
    15,778.28x = 21,774.06 × 8,704.69
  4. Step 4: Simplify right side
    15,778.28x = 189,536,387.91
  5. Step 5: Solve for x
    x = 189,536,387.91/15,778.28
  6. Step 6: Final answer
    x = 12,012.49

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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.