Home / 20,677.92-28,537.20-12,722.88

Finding the Fourth Proportional to 20,677.92, 28,537.20 and 12,722.88

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Solution

The fourth proportional to 20,677.92, 28,537.20 and 12,722.88 is: 17,558.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,677.92 : 28,537.20 = 12,722.88 : x
  2. Step 2: Convert to fraction form
    20,677.92/28,537.20 = 12,722.88/x
  3. Step 3: Cross multiply
    20,677.92x = 28,537.20 × 12,722.88
  4. Step 4: Simplify right side
    20,677.92x = 363,075,371.14
  5. Step 5: Solve for x
    x = 363,075,371.14/20,677.92
  6. Step 6: Final answer
    x = 17,558.60

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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.