Home / 20,780.48-31,159.20-8,299.52

Finding the Fourth Proportional to 20,780.48, 31,159.20 and 8,299.52

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Solution

The fourth proportional to 20,780.48, 31,159.20 and 8,299.52 is: 12,444.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.48 : 31,159.20 = 8,299.52 : x
  2. Step 2: Convert to fraction form
    20,780.48/31,159.20 = 8,299.52/x
  3. Step 3: Cross multiply
    20,780.48x = 31,159.20 × 8,299.52
  4. Step 4: Simplify right side
    20,780.48x = 258,606,403.58
  5. Step 5: Solve for x
    x = 258,606,403.58/20,780.48
  6. Step 6: Final answer
    x = 12,444.68

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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.