Home / 15,859.44-21,885.30-8,689.32

Finding the Fourth Proportional to 15,859.44, 21,885.30 and 8,689.32

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Solution

The fourth proportional to 15,859.44, 21,885.30 and 8,689.32 is: 11,990.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,859.44 : 21,885.30 = 8,689.32 : x
  2. Step 2: Convert to fraction form
    15,859.44/21,885.30 = 8,689.32/x
  3. Step 3: Cross multiply
    15,859.44x = 21,885.30 × 8,689.32
  4. Step 4: Simplify right side
    15,859.44x = 190,168,375.00
  5. Step 5: Solve for x
    x = 190,168,375.00/15,859.44
  6. Step 6: Final answer
    x = 11,990.86

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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.