Home / 12,100.78-18,032.50-11,998.72

Finding the Fourth Proportional to 12,100.78, 18,032.50 and 11,998.72

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Solution

The fourth proportional to 12,100.78, 18,032.50 and 11,998.72 is: 17,880.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,100.78 : 18,032.50 = 11,998.72 : x
  2. Step 2: Convert to fraction form
    12,100.78/18,032.50 = 11,998.72/x
  3. Step 3: Cross multiply
    12,100.78x = 18,032.50 × 11,998.72
  4. Step 4: Simplify right side
    12,100.78x = 216,366,918.40
  5. Step 5: Solve for x
    x = 216,366,918.40/12,100.78
  6. Step 6: Final answer
    x = 17,880.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.