Home / 26,988.80-40,418.40-13,121.60

Finding the Fourth Proportional to 26,988.80, 40,418.40 and 13,121.60

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Solution

The fourth proportional to 26,988.80, 40,418.40 and 13,121.60 is: 19,650.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,988.80 : 40,418.40 = 13,121.60 : x
  2. Step 2: Convert to fraction form
    26,988.80/40,418.40 = 13,121.60/x
  3. Step 3: Cross multiply
    26,988.80x = 40,418.40 × 13,121.60
  4. Step 4: Simplify right side
    26,988.80x = 530,354,077.44
  5. Step 5: Solve for x
    x = 530,354,077.44/26,988.80
  6. Step 6: Final answer
    x = 19,650.90

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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.