Home / 15,686.83-21,651.83-8,974.57

Finding the Fourth Proportional to 15,686.83, 21,651.83 and 8,974.57

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Solution

The fourth proportional to 15,686.83, 21,651.83 and 8,974.57 is: 12,387.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.83 : 21,651.83 = 8,974.57 : x
  2. Step 2: Convert to fraction form
    15,686.83/21,651.83 = 8,974.57/x
  3. Step 3: Cross multiply
    15,686.83x = 21,651.83 × 8,974.57
  4. Step 4: Simplify right side
    15,686.83x = 194,315,863.96
  5. Step 5: Solve for x
    x = 194,315,863.96/15,686.83
  6. Step 6: Final answer
    x = 12,387.20

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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.