Home / 15,689.44-21,649.12-8,974

Finding the Fourth Proportional to 15,689.44, 21,649.12 and 8,974

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Solution

The fourth proportional to 15,689.44, 21,649.12 and 8,974 is: 12,382.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.44 : 21,649.12 = 8,974 : x
  2. Step 2: Convert to fraction form
    15,689.44/21,649.12 = 8,974/x
  3. Step 3: Cross multiply
    15,689.44x = 21,649.12 × 8,974
  4. Step 4: Simplify right side
    15,689.44x = 194,279,202.88
  5. Step 5: Solve for x
    x = 194,279,202.88/15,689.44
  6. Step 6: Final answer
    x = 12,382.80

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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.