Home / 12,938.43-19,407.49-9,123.36

Finding the Fourth Proportional to 12,938.43, 19,407.49 and 9,123.36

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Solution

The fourth proportional to 12,938.43, 19,407.49 and 9,123.36 is: 13,684.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.43 : 19,407.49 = 9,123.36 : x
  2. Step 2: Convert to fraction form
    12,938.43/19,407.49 = 9,123.36/x
  3. Step 3: Cross multiply
    12,938.43x = 19,407.49 × 9,123.36
  4. Step 4: Simplify right side
    12,938.43x = 177,061,398.12
  5. Step 5: Solve for x
    x = 177,061,398.12/12,938.43
  6. Step 6: Final answer
    x = 13,684.93

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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.