Home / 15,805.30-21,811.15-8,731.26

Finding the Fourth Proportional to 15,805.30, 21,811.15 and 8,731.26

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Solution

The fourth proportional to 15,805.30, 21,811.15 and 8,731.26 is: 12,049.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,805.30 : 21,811.15 = 8,731.26 : x
  2. Step 2: Convert to fraction form
    15,805.30/21,811.15 = 8,731.26/x
  3. Step 3: Cross multiply
    15,805.30x = 21,811.15 × 8,731.26
  4. Step 4: Simplify right side
    15,805.30x = 190,438,821.55
  5. Step 5: Solve for x
    x = 190,438,821.55/15,805.30
  6. Step 6: Final answer
    x = 12,049.05

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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.