Home / 20,678.31-31,010.51-8,202.63

Finding the Fourth Proportional to 20,678.31, 31,010.51 and 8,202.63

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Solution

The fourth proportional to 20,678.31, 31,010.51 and 8,202.63 is: 12,301.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.31 : 31,010.51 = 8,202.63 : x
  2. Step 2: Convert to fraction form
    20,678.31/31,010.51 = 8,202.63/x
  3. Step 3: Cross multiply
    20,678.31x = 31,010.51 × 8,202.63
  4. Step 4: Simplify right side
    20,678.31x = 254,367,698.63
  5. Step 5: Solve for x
    x = 254,367,698.63/20,678.31
  6. Step 6: Final answer
    x = 12,301.18

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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.