Home / 21,853.76-30,158.18-12,422.92

Finding the Fourth Proportional to 21,853.76, 30,158.18 and 12,422.92

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Solution

The fourth proportional to 21,853.76, 30,158.18 and 12,422.92 is: 17,143.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,853.76 : 30,158.18 = 12,422.92 : x
  2. Step 2: Convert to fraction form
    21,853.76/30,158.18 = 12,422.92/x
  3. Step 3: Cross multiply
    21,853.76x = 30,158.18 × 12,422.92
  4. Step 4: Simplify right side
    21,853.76x = 374,652,657.49
  5. Step 5: Solve for x
    x = 374,652,657.49/21,853.76
  6. Step 6: Final answer
    x = 17,143.62

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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.