Home / 20,999.52-31,499.28-14,405.72

Finding the Fourth Proportional to 20,999.52, 31,499.28 and 14,405.72

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Solution

The fourth proportional to 20,999.52, 31,499.28 and 14,405.72 is: 21,608.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.52 : 31,499.28 = 14,405.72 : x
  2. Step 2: Convert to fraction form
    20,999.52/31,499.28 = 14,405.72/x
  3. Step 3: Cross multiply
    20,999.52x = 31,499.28 × 14,405.72
  4. Step 4: Simplify right side
    20,999.52x = 453,769,650.39
  5. Step 5: Solve for x
    x = 453,769,650.39/20,999.52
  6. Step 6: Final answer
    x = 21,608.57

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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.