Home / 21,356.67-29,442.56-18,403.95

Finding the Fourth Proportional to 21,356.67, 29,442.56 and 18,403.95

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Solution

The fourth proportional to 21,356.67, 29,442.56 and 18,403.95 is: 25,371.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,356.67 : 29,442.56 = 18,403.95 : x
  2. Step 2: Convert to fraction form
    21,356.67/29,442.56 = 18,403.95/x
  3. Step 3: Cross multiply
    21,356.67x = 29,442.56 × 18,403.95
  4. Step 4: Simplify right side
    21,356.67x = 541,859,310.09
  5. Step 5: Solve for x
    x = 541,859,310.09/21,356.67
  6. Step 6: Final answer
    x = 25,371.90

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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.