Home / 12,115.60-18,151.80-9,912.40

Finding the Fourth Proportional to 12,115.60, 18,151.80 and 9,912.40

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Solution

The fourth proportional to 12,115.60, 18,151.80 and 9,912.40 is: 14,850.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.60 : 18,151.80 = 9,912.40 : x
  2. Step 2: Convert to fraction form
    12,115.60/18,151.80 = 9,912.40/x
  3. Step 3: Cross multiply
    12,115.60x = 18,151.80 × 9,912.40
  4. Step 4: Simplify right side
    12,115.60x = 179,927,902.32
  5. Step 5: Solve for x
    x = 179,927,902.32/12,115.60
  6. Step 6: Final answer
    x = 14,850.93

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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.