Home / 20,339.60-28,048.93-15,861.72

Finding the Fourth Proportional to 20,339.60, 28,048.93 and 15,861.72

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Solution

The fourth proportional to 20,339.60, 28,048.93 and 15,861.72 is: 21,873.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,339.60 : 28,048.93 = 15,861.72 : x
  2. Step 2: Convert to fraction form
    20,339.60/28,048.93 = 15,861.72/x
  3. Step 3: Cross multiply
    20,339.60x = 28,048.93 × 15,861.72
  4. Step 4: Simplify right side
    20,339.60x = 444,904,234.31
  5. Step 5: Solve for x
    x = 444,904,234.31/20,339.60
  6. Step 6: Final answer
    x = 21,873.79

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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.