Home / 20,702.04-31,065.78-8,219.88

Finding the Fourth Proportional to 20,702.04, 31,065.78 and 8,219.88

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Solution

The fourth proportional to 20,702.04, 31,065.78 and 8,219.88 is: 12,334.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.04 : 31,065.78 = 8,219.88 : x
  2. Step 2: Convert to fraction form
    20,702.04/31,065.78 = 8,219.88/x
  3. Step 3: Cross multiply
    20,702.04x = 31,065.78 × 8,219.88
  4. Step 4: Simplify right side
    20,702.04x = 255,356,983.71
  5. Step 5: Solve for x
    x = 255,356,983.71/20,702.04
  6. Step 6: Final answer
    x = 12,334.87

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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.