Home / 12,942.60-17,869.65-9,912.38

Finding the Fourth Proportional to 12,942.60, 17,869.65 and 9,912.38

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Solution

The fourth proportional to 12,942.60, 17,869.65 and 9,912.38 is: 13,685.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,942.60 : 17,869.65 = 9,912.38 : x
  2. Step 2: Convert to fraction form
    12,942.60/17,869.65 = 9,912.38/x
  3. Step 3: Cross multiply
    12,942.60x = 17,869.65 × 9,912.38
  4. Step 4: Simplify right side
    12,942.60x = 177,130,671.92
  5. Step 5: Solve for x
    x = 177,130,671.92/12,942.60
  6. Step 6: Final answer
    x = 13,685.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.