Home / 15,760.20-21,748.97-8,686.63

Finding the Fourth Proportional to 15,760.20, 21,748.97 and 8,686.63

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Solution

The fourth proportional to 15,760.20, 21,748.97 and 8,686.63 is: 11,987.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,760.20 : 21,748.97 = 8,686.63 : x
  2. Step 2: Convert to fraction form
    15,760.20/21,748.97 = 8,686.63/x
  3. Step 3: Cross multiply
    15,760.20x = 21,748.97 × 8,686.63
  4. Step 4: Simplify right side
    15,760.20x = 188,925,181.84
  5. Step 5: Solve for x
    x = 188,925,181.84/15,760.20
  6. Step 6: Final answer
    x = 11,987.48

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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.