Home / 21,979.18-30,329.28-13,025.24

Finding the Fourth Proportional to 21,979.18, 30,329.28 and 13,025.24

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Solution

The fourth proportional to 21,979.18, 30,329.28 and 13,025.24 is: 17,973.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.18 : 30,329.28 = 13,025.24 : x
  2. Step 2: Convert to fraction form
    21,979.18/30,329.28 = 13,025.24/x
  3. Step 3: Cross multiply
    21,979.18x = 30,329.28 × 13,025.24
  4. Step 4: Simplify right side
    21,979.18x = 395,046,151.03
  5. Step 5: Solve for x
    x = 395,046,151.03/21,979.18
  6. Step 6: Final answer
    x = 17,973.65

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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.