Home / 21,006.32-31,520.46-13,608.86

Finding the Fourth Proportional to 21,006.32, 31,520.46 and 13,608.86

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Solution

The fourth proportional to 21,006.32, 31,520.46 and 13,608.86 is: 20,420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.32 : 31,520.46 = 13,608.86 : x
  2. Step 2: Convert to fraction form
    21,006.32/31,520.46 = 13,608.86/x
  3. Step 3: Cross multiply
    21,006.32x = 31,520.46 × 13,608.86
  4. Step 4: Simplify right side
    21,006.32x = 428,957,527.28
  5. Step 5: Solve for x
    x = 428,957,527.28/21,006.32
  6. Step 6: Final answer
    x = 20,420.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.