Home / 26,928.80-40,364.40-12,135.20

Finding the Fourth Proportional to 26,928.80, 40,364.40 and 12,135.20

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Solution

The fourth proportional to 26,928.80, 40,364.40 and 12,135.20 is: 18,189.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,928.80 : 40,364.40 = 12,135.20 : x
  2. Step 2: Convert to fraction form
    26,928.80/40,364.40 = 12,135.20/x
  3. Step 3: Cross multiply
    26,928.80x = 40,364.40 × 12,135.20
  4. Step 4: Simplify right side
    26,928.80x = 489,830,066.88
  5. Step 5: Solve for x
    x = 489,830,066.88/26,928.80
  6. Step 6: Final answer
    x = 18,189.82

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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.