Home / 12,081.60-18,100.80-9,878.40

Finding the Fourth Proportional to 12,081.60, 18,100.80 and 9,878.40

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Solution

The fourth proportional to 12,081.60, 18,100.80 and 9,878.40 is: 14,799.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,081.60 : 18,100.80 = 9,878.40 : x
  2. Step 2: Convert to fraction form
    12,081.60/18,100.80 = 9,878.40/x
  3. Step 3: Cross multiply
    12,081.60x = 18,100.80 × 9,878.40
  4. Step 4: Simplify right side
    12,081.60x = 178,806,942.72
  5. Step 5: Solve for x
    x = 178,806,942.72/12,081.60
  6. Step 6: Final answer
    x = 14,799.94

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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.