Home / 21,917.10-30,247.86-13,424.86

Finding the Fourth Proportional to 21,917.10, 30,247.86 and 13,424.86

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Solution

The fourth proportional to 21,917.10, 30,247.86 and 13,424.86 is: 18,527.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,917.10 : 30,247.86 = 13,424.86 : x
  2. Step 2: Convert to fraction form
    21,917.10/30,247.86 = 13,424.86/x
  3. Step 3: Cross multiply
    21,917.10x = 30,247.86 × 13,424.86
  4. Step 4: Simplify right side
    21,917.10x = 406,073,285.80
  5. Step 5: Solve for x
    x = 406,073,285.80/21,917.10
  6. Step 6: Final answer
    x = 18,527.69

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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.