Home / 20,557.86-28,340.17-13,471.98

Finding the Fourth Proportional to 20,557.86, 28,340.17 and 13,471.98

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Solution

The fourth proportional to 20,557.86, 28,340.17 and 13,471.98 is: 18,571.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.86 : 28,340.17 = 13,471.98 : x
  2. Step 2: Convert to fraction form
    20,557.86/28,340.17 = 13,471.98/x
  3. Step 3: Cross multiply
    20,557.86x = 28,340.17 × 13,471.98
  4. Step 4: Simplify right side
    20,557.86x = 381,798,203.44
  5. Step 5: Solve for x
    x = 381,798,203.44/20,557.86
  6. Step 6: Final answer
    x = 18,571.88

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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.