Home / 21,324.40-29,425.67-20,607.83

Finding the Fourth Proportional to 21,324.40, 29,425.67 and 20,607.83

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Solution

The fourth proportional to 21,324.40, 29,425.67 and 20,607.83 is: 28,436.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324.40 : 29,425.67 = 20,607.83 : x
  2. Step 2: Convert to fraction form
    21,324.40/29,425.67 = 20,607.83/x
  3. Step 3: Cross multiply
    21,324.40x = 29,425.67 × 20,607.83
  4. Step 4: Simplify right side
    21,324.40x = 606,398,954.83
  5. Step 5: Solve for x
    x = 606,398,954.83/21,324.40
  6. Step 6: Final answer
    x = 28,436.86

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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.