Home / 15,138.24-20,890.49-8,423.75

Finding the Fourth Proportional to 15,138.24, 20,890.49 and 8,423.75

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Solution

The fourth proportional to 15,138.24, 20,890.49 and 8,423.75 is: 11,624.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,138.24 : 20,890.49 = 8,423.75 : x
  2. Step 2: Convert to fraction form
    15,138.24/20,890.49 = 8,423.75/x
  3. Step 3: Cross multiply
    15,138.24x = 20,890.49 × 8,423.75
  4. Step 4: Simplify right side
    15,138.24x = 175,976,118.57
  5. Step 5: Solve for x
    x = 175,976,118.57/15,138.24
  6. Step 6: Final answer
    x = 11,624.61

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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.