Home / 18,121.86-25,027.18-12,471.20

Finding the Fourth Proportional to 18,121.86, 25,027.18 and 12,471.20

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Solution

The fourth proportional to 18,121.86, 25,027.18 and 12,471.20 is: 17,223.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121.86 : 25,027.18 = 12,471.20 : x
  2. Step 2: Convert to fraction form
    18,121.86/25,027.18 = 12,471.20/x
  3. Step 3: Cross multiply
    18,121.86x = 25,027.18 × 12,471.20
  4. Step 4: Simplify right side
    18,121.86x = 312,119,010.34
  5. Step 5: Solve for x
    x = 312,119,010.34/18,121.86
  6. Step 6: Final answer
    x = 17,223.34

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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.