Home / 20,739.31-31,118.98-10,203.62

Finding the Fourth Proportional to 20,739.31, 31,118.98 and 10,203.62

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Solution

The fourth proportional to 20,739.31, 31,118.98 and 10,203.62 is: 15,310.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.31 : 31,118.98 = 10,203.62 : x
  2. Step 2: Convert to fraction form
    20,739.31/31,118.98 = 10,203.62/x
  3. Step 3: Cross multiply
    20,739.31x = 31,118.98 × 10,203.62
  4. Step 4: Simplify right side
    20,739.31x = 317,526,143.40
  5. Step 5: Solve for x
    x = 317,526,143.40/20,739.31
  6. Step 6: Final answer
    x = 15,310.35

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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.