Home / 20,806.30-31,144.65-12,015.10

Finding the Fourth Proportional to 20,806.30, 31,144.65 and 12,015.10

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Solution

The fourth proportional to 20,806.30, 31,144.65 and 12,015.10 is: 17,985.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.30 : 31,144.65 = 12,015.10 : x
  2. Step 2: Convert to fraction form
    20,806.30/31,144.65 = 12,015.10/x
  3. Step 3: Cross multiply
    20,806.30x = 31,144.65 × 12,015.10
  4. Step 4: Simplify right side
    20,806.30x = 374,206,084.22
  5. Step 5: Solve for x
    x = 374,206,084.22/20,806.30
  6. Step 6: Final answer
    x = 17,985.23

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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.