Home / 21,934.32-30,267-12,982.20

Finding the Fourth Proportional to 21,934.32, 30,267 and 12,982.20

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Solution

The fourth proportional to 21,934.32, 30,267 and 12,982.20 is: 17,914.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,934.32 : 30,267 = 12,982.20 : x
  2. Step 2: Convert to fraction form
    21,934.32/30,267 = 12,982.20/x
  3. Step 3: Cross multiply
    21,934.32x = 30,267 × 12,982.20
  4. Step 4: Simplify right side
    21,934.32x = 392,932,247.40
  5. Step 5: Solve for x
    x = 392,932,247.40/21,934.32
  6. Step 6: Final answer
    x = 17,914.04

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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.