Home / 21,864.78-30,173.40-12,433.92

Finding the Fourth Proportional to 21,864.78, 30,173.40 and 12,433.92

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Solution

The fourth proportional to 21,864.78, 30,173.40 and 12,433.92 is: 17,158.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,864.78 : 30,173.40 = 12,433.92 : x
  2. Step 2: Convert to fraction form
    21,864.78/30,173.40 = 12,433.92/x
  3. Step 3: Cross multiply
    21,864.78x = 30,173.40 × 12,433.92
  4. Step 4: Simplify right side
    21,864.78x = 375,173,641.73
  5. Step 5: Solve for x
    x = 375,173,641.73/21,864.78
  6. Step 6: Final answer
    x = 17,158.81

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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.