Home / 15,454.20-21,315.78-10,909.56

Finding the Fourth Proportional to 15,454.20, 21,315.78 and 10,909.56

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Solution

The fourth proportional to 15,454.20, 21,315.78 and 10,909.56 is: 15,047.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,454.20 : 21,315.78 = 10,909.56 : x
  2. Step 2: Convert to fraction form
    15,454.20/21,315.78 = 10,909.56/x
  3. Step 3: Cross multiply
    15,454.20x = 21,315.78 × 10,909.56
  4. Step 4: Simplify right side
    15,454.20x = 232,545,780.86
  5. Step 5: Solve for x
    x = 232,545,780.86/15,454.20
  6. Step 6: Final answer
    x = 15,047.42

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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.