Home / 21,761.19-30,028.81-12,329.55

Finding the Fourth Proportional to 21,761.19, 30,028.81 and 12,329.55

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Solution

The fourth proportional to 21,761.19, 30,028.81 and 12,329.55 is: 17,013.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,761.19 : 30,028.81 = 12,329.55 : x
  2. Step 2: Convert to fraction form
    21,761.19/30,028.81 = 12,329.55/x
  3. Step 3: Cross multiply
    21,761.19x = 30,028.81 × 12,329.55
  4. Step 4: Simplify right side
    21,761.19x = 370,241,714.34
  5. Step 5: Solve for x
    x = 370,241,714.34/21,761.19
  6. Step 6: Final answer
    x = 17,013.85

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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.