Home / 18,454.98-27,680.30-5,128.99

Finding the Fourth Proportional to 18,454.98, 27,680.30 and 5,128.99

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Solution

The fourth proportional to 18,454.98, 27,680.30 and 5,128.99 is: 7,692.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,454.98 : 27,680.30 = 5,128.99 : x
  2. Step 2: Convert to fraction form
    18,454.98/27,680.30 = 5,128.99/x
  3. Step 3: Cross multiply
    18,454.98x = 27,680.30 × 5,128.99
  4. Step 4: Simplify right side
    18,454.98x = 141,971,981.90
  5. Step 5: Solve for x
    x = 141,971,981.90/18,454.98
  6. Step 6: Final answer
    x = 7,692.88

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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.