Home / 20,703.54-31,068.03-8,221.38

Finding the Fourth Proportional to 20,703.54, 31,068.03 and 8,221.38

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Solution

The fourth proportional to 20,703.54, 31,068.03 and 8,221.38 is: 12,337.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.54 : 31,068.03 = 8,221.38 : x
  2. Step 2: Convert to fraction form
    20,703.54/31,068.03 = 8,221.38/x
  3. Step 3: Cross multiply
    20,703.54x = 31,068.03 × 8,221.38
  4. Step 4: Simplify right side
    20,703.54x = 255,422,080.48
  5. Step 5: Solve for x
    x = 255,422,080.48/20,703.54
  6. Step 6: Final answer
    x = 12,337.12

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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.