Home / 21,761.28-30,031.20-12,329.52

Finding the Fourth Proportional to 21,761.28, 30,031.20 and 12,329.52

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Solution

The fourth proportional to 21,761.28, 30,031.20 and 12,329.52 is: 17,015.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,761.28 : 30,031.20 = 12,329.52 : x
  2. Step 2: Convert to fraction form
    21,761.28/30,031.20 = 12,329.52/x
  3. Step 3: Cross multiply
    21,761.28x = 30,031.20 × 12,329.52
  4. Step 4: Simplify right side
    21,761.28x = 370,270,281.02
  5. Step 5: Solve for x
    x = 370,270,281.02/21,761.28
  6. Step 6: Final answer
    x = 17,015.10

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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.