Home / 20,055.20-27,672.84-12,886.70

Finding the Fourth Proportional to 20,055.20, 27,672.84 and 12,886.70

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Solution

The fourth proportional to 20,055.20, 27,672.84 and 12,886.70 is: 17,781.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,055.20 : 27,672.84 = 12,886.70 : x
  2. Step 2: Convert to fraction form
    20,055.20/27,672.84 = 12,886.70/x
  3. Step 3: Cross multiply
    20,055.20x = 27,672.84 × 12,886.70
  4. Step 4: Simplify right side
    20,055.20x = 356,611,448.86
  5. Step 5: Solve for x
    x = 356,611,448.86/20,055.20
  6. Step 6: Final answer
    x = 17,781.50

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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.