Home / 20,780.60-31,171.02-6,929.56

Finding the Fourth Proportional to 20,780.60, 31,171.02 and 6,929.56

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Solution

The fourth proportional to 20,780.60, 31,171.02 and 6,929.56 is: 10,394.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.60 : 31,171.02 = 6,929.56 : x
  2. Step 2: Convert to fraction form
    20,780.60/31,171.02 = 6,929.56/x
  3. Step 3: Cross multiply
    20,780.60x = 31,171.02 × 6,929.56
  4. Step 4: Simplify right side
    20,780.60x = 216,001,453.35
  5. Step 5: Solve for x
    x = 216,001,453.35/20,780.60
  6. Step 6: Final answer
    x = 10,394.38

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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.