Home / 39,906.68-55,070.03-21,756.70

Finding the Fourth Proportional to 39,906.68, 55,070.03 and 21,756.70

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Solution

The fourth proportional to 39,906.68, 55,070.03 and 21,756.70 is: 30,023.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,906.68 : 55,070.03 = 21,756.70 : x
  2. Step 2: Convert to fraction form
    39,906.68/55,070.03 = 21,756.70/x
  3. Step 3: Cross multiply
    39,906.68x = 55,070.03 × 21,756.70
  4. Step 4: Simplify right side
    39,906.68x = 1,198,142,122.55
  5. Step 5: Solve for x
    x = 1,198,142,122.55/39,906.68
  6. Step 6: Final answer
    x = 30,023.60

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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.