Home / 15,760.35-21,749.18-8,686.76

Finding the Fourth Proportional to 15,760.35, 21,749.18 and 8,686.76

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Solution

The fourth proportional to 15,760.35, 21,749.18 and 8,686.76 is: 11,987.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,760.35 : 21,749.18 = 8,686.76 : x
  2. Step 2: Convert to fraction form
    15,760.35/21,749.18 = 8,686.76/x
  3. Step 3: Cross multiply
    15,760.35x = 21,749.18 × 8,686.76
  4. Step 4: Simplify right side
    15,760.35x = 188,929,754.68
  5. Step 5: Solve for x
    x = 188,929,754.68/15,760.35
  6. Step 6: Final answer
    x = 11,987.66

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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.