Home / 15,418.80-21,278.02-8,704.70

Finding the Fourth Proportional to 15,418.80, 21,278.02 and 8,704.70

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Solution

The fourth proportional to 15,418.80, 21,278.02 and 8,704.70 is: 12,012.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,418.80 : 21,278.02 = 8,704.70 : x
  2. Step 2: Convert to fraction form
    15,418.80/21,278.02 = 8,704.70/x
  3. Step 3: Cross multiply
    15,418.80x = 21,278.02 × 8,704.70
  4. Step 4: Simplify right side
    15,418.80x = 185,218,780.69
  5. Step 5: Solve for x
    x = 185,218,780.69/15,418.80
  6. Step 6: Final answer
    x = 12,012.53

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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.