Home / 20,215.20-27,893.72-12,657.84

Finding the Fourth Proportional to 20,215.20, 27,893.72 and 12,657.84

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Solution

The fourth proportional to 20,215.20, 27,893.72 and 12,657.84 is: 17,465.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.20 : 27,893.72 = 12,657.84 : x
  2. Step 2: Convert to fraction form
    20,215.20/27,893.72 = 12,657.84/x
  3. Step 3: Cross multiply
    20,215.20x = 27,893.72 × 12,657.84
  4. Step 4: Simplify right side
    20,215.20x = 353,074,244.76
  5. Step 5: Solve for x
    x = 353,074,244.76/20,215.20
  6. Step 6: Final answer
    x = 17,465.78

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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.