Home / 21,760.62-30,031.56-13,260.66

Finding the Fourth Proportional to 21,760.62, 30,031.56 and 13,260.66

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Solution

The fourth proportional to 21,760.62, 30,031.56 and 13,260.66 is: 18,300.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,760.62 : 30,031.56 = 13,260.66 : x
  2. Step 2: Convert to fraction form
    21,760.62/30,031.56 = 13,260.66/x
  3. Step 3: Cross multiply
    21,760.62x = 30,031.56 × 13,260.66
  4. Step 4: Simplify right side
    21,760.62x = 398,238,306.43
  5. Step 5: Solve for x
    x = 398,238,306.43/21,760.62
  6. Step 6: Final answer
    x = 18,300.87

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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.