Home / 21,862.92-30,168.05-12,431.68

Finding the Fourth Proportional to 21,862.92, 30,168.05 and 12,431.68

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Solution

The fourth proportional to 21,862.92, 30,168.05 and 12,431.68 is: 17,154.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,862.92 : 30,168.05 = 12,431.68 : x
  2. Step 2: Convert to fraction form
    21,862.92/30,168.05 = 12,431.68/x
  3. Step 3: Cross multiply
    21,862.92x = 30,168.05 × 12,431.68
  4. Step 4: Simplify right side
    21,862.92x = 375,039,574.90
  5. Step 5: Solve for x
    x = 375,039,574.90/21,862.92
  6. Step 6: Final answer
    x = 17,154.14

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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.