Home / 21,979.71-30,332.52-12,549.15

Finding the Fourth Proportional to 21,979.71, 30,332.52 and 12,549.15

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Solution

The fourth proportional to 21,979.71, 30,332.52 and 12,549.15 is: 17,318.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.71 : 30,332.52 = 12,549.15 : x
  2. Step 2: Convert to fraction form
    21,979.71/30,332.52 = 12,549.15/x
  3. Step 3: Cross multiply
    21,979.71x = 30,332.52 × 12,549.15
  4. Step 4: Simplify right side
    21,979.71x = 380,647,343.36
  5. Step 5: Solve for x
    x = 380,647,343.36/21,979.71
  6. Step 6: Final answer
    x = 17,318.12

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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.