Home / 20,809.60-31,214.56-8,330.70

Finding the Fourth Proportional to 20,809.60, 31,214.56 and 8,330.70

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Solution

The fourth proportional to 20,809.60, 31,214.56 and 8,330.70 is: 12,496.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.60 : 31,214.56 = 8,330.70 : x
  2. Step 2: Convert to fraction form
    20,809.60/31,214.56 = 8,330.70/x
  3. Step 3: Cross multiply
    20,809.60x = 31,214.56 × 8,330.70
  4. Step 4: Simplify right side
    20,809.60x = 260,039,134.99
  5. Step 5: Solve for x
    x = 260,039,134.99/20,809.60
  6. Step 6: Final answer
    x = 12,496.11

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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.