Home / 15,760.46-21,750.24-8,686.86

Finding the Fourth Proportional to 15,760.46, 21,750.24 and 8,686.86

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Solution

The fourth proportional to 15,760.46, 21,750.24 and 8,686.86 is: 11,988.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,760.46 : 21,750.24 = 8,686.86 : x
  2. Step 2: Convert to fraction form
    15,760.46/21,750.24 = 8,686.86/x
  3. Step 3: Cross multiply
    15,760.46x = 21,750.24 × 8,686.86
  4. Step 4: Simplify right side
    15,760.46x = 188,941,289.85
  5. Step 5: Solve for x
    x = 188,941,289.85/15,760.46
  6. Step 6: Final answer
    x = 11,988.31

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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.