Home / 15,113.52-20,856.69-8,399.57

Finding the Fourth Proportional to 15,113.52, 20,856.69 and 8,399.57

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Solution

The fourth proportional to 15,113.52, 20,856.69 and 8,399.57 is: 11,591.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,113.52 : 20,856.69 = 8,399.57 : x
  2. Step 2: Convert to fraction form
    15,113.52/20,856.69 = 8,399.57/x
  3. Step 3: Cross multiply
    15,113.52x = 20,856.69 × 8,399.57
  4. Step 4: Simplify right side
    15,113.52x = 175,187,123.34
  5. Step 5: Solve for x
    x = 175,187,123.34/15,113.52
  6. Step 6: Final answer
    x = 11,591.42

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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.