Home / 21,031.76-31,491.48-18,540.56

Finding the Fourth Proportional to 21,031.76, 31,491.48 and 18,540.56

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Solution

The fourth proportional to 21,031.76, 31,491.48 and 18,540.56 is: 27,761.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.76 : 31,491.48 = 18,540.56 : x
  2. Step 2: Convert to fraction form
    21,031.76/31,491.48 = 18,540.56/x
  3. Step 3: Cross multiply
    21,031.76x = 31,491.48 × 18,540.56
  4. Step 4: Simplify right side
    21,031.76x = 583,869,674.43
  5. Step 5: Solve for x
    x = 583,869,674.43/21,031.76
  6. Step 6: Final answer
    x = 27,761.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.