Home / 21,179.84-31,769.76-8,697.74

Finding the Fourth Proportional to 21,179.84, 31,769.76 and 8,697.74

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Solution

The fourth proportional to 21,179.84, 31,769.76 and 8,697.74 is: 13,046.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.84 : 31,769.76 = 8,697.74 : x
  2. Step 2: Convert to fraction form
    21,179.84/31,769.76 = 8,697.74/x
  3. Step 3: Cross multiply
    21,179.84x = 31,769.76 × 8,697.74
  4. Step 4: Simplify right side
    21,179.84x = 276,325,112.34
  5. Step 5: Solve for x
    x = 276,325,112.34/21,179.84
  6. Step 6: Final answer
    x = 13,046.61

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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.