Home / 20,500.86-28,280.41-12,944.46

Finding the Fourth Proportional to 20,500.86, 28,280.41 and 12,944.46

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Solution

The fourth proportional to 20,500.86, 28,280.41 and 12,944.46 is: 17,856.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,500.86 : 28,280.41 = 12,944.46 : x
  2. Step 2: Convert to fraction form
    20,500.86/28,280.41 = 12,944.46/x
  3. Step 3: Cross multiply
    20,500.86x = 28,280.41 × 12,944.46
  4. Step 4: Simplify right side
    20,500.86x = 366,074,636.03
  5. Step 5: Solve for x
    x = 366,074,636.03/20,500.86
  6. Step 6: Final answer
    x = 17,856.55

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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.