Home / 21,863.84-30,171.97-12,432.40

Finding the Fourth Proportional to 21,863.84, 30,171.97 and 12,432.40

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Solution

The fourth proportional to 21,863.84, 30,171.97 and 12,432.40 is: 17,156.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,863.84 : 30,171.97 = 12,432.40 : x
  2. Step 2: Convert to fraction form
    21,863.84/30,171.97 = 12,432.40/x
  3. Step 3: Cross multiply
    21,863.84x = 30,171.97 × 12,432.40
  4. Step 4: Simplify right side
    21,863.84x = 375,109,999.83
  5. Step 5: Solve for x
    x = 375,109,999.83/21,863.84
  6. Step 6: Final answer
    x = 17,156.64

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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.