Home / 21,976.16-30,319.92-12,542.88

Finding the Fourth Proportional to 21,976.16, 30,319.92 and 12,542.88

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Solution

The fourth proportional to 21,976.16, 30,319.92 and 12,542.88 is: 17,305.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,976.16 : 30,319.92 = 12,542.88 : x
  2. Step 2: Convert to fraction form
    21,976.16/30,319.92 = 12,542.88/x
  3. Step 3: Cross multiply
    21,976.16x = 30,319.92 × 12,542.88
  4. Step 4: Simplify right side
    21,976.16x = 380,299,118.17
  5. Step 5: Solve for x
    x = 380,299,118.17/21,976.16
  6. Step 6: Final answer
    x = 17,305.08

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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.