Home / 18,963.84-28,422.70-13,418.80

Finding the Fourth Proportional to 18,963.84, 28,422.70 and 13,418.80

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Solution

The fourth proportional to 18,963.84, 28,422.70 and 13,418.80 is: 20,111.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,963.84 : 28,422.70 = 13,418.80 : x
  2. Step 2: Convert to fraction form
    18,963.84/28,422.70 = 13,418.80/x
  3. Step 3: Cross multiply
    18,963.84x = 28,422.70 × 13,418.80
  4. Step 4: Simplify right side
    18,963.84x = 381,398,526.76
  5. Step 5: Solve for x
    x = 381,398,526.76/18,963.84
  6. Step 6: Final answer
    x = 20,111.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.