Home / 12,128,081.40-18,192,122.10-11,888,932.95

Finding the Fourth Proportional to 12,128,081.40, 18,192,122.10 and 11,888,932.95

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Solution

The fourth proportional to 12,128,081.40, 18,192,122.10 and 11,888,932.95 is: 17,833,399.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,081.40 : 18,192,122.10 = 11,888,932.95 : x
  2. Step 2: Convert to fraction form
    12,128,081.40/18,192,122.10 = 11,888,932.95/x
  3. Step 3: Cross multiply
    12,128,081.40x = 18,192,122.10 × 11,888,932.95
  4. Step 4: Simplify right side
    12,128,081.40x = 216,284,919,865,113.19
  5. Step 5: Solve for x
    x = 216,284,919,865,113.19/12,128,081.40
  6. Step 6: Final answer
    x = 17,833,399.43

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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.