Home / 20,749.11-28,632.78-12,696.15

Finding the Fourth Proportional to 20,749.11, 28,632.78 and 12,696.15

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Solution

The fourth proportional to 20,749.11, 28,632.78 and 12,696.15 is: 17,520.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.11 : 28,632.78 = 12,696.15 : x
  2. Step 2: Convert to fraction form
    20,749.11/28,632.78 = 12,696.15/x
  3. Step 3: Cross multiply
    20,749.11x = 28,632.78 × 12,696.15
  4. Step 4: Simplify right side
    20,749.11x = 363,526,069.80
  5. Step 5: Solve for x
    x = 363,526,069.80/20,749.11
  6. Step 6: Final answer
    x = 17,520.08

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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.