Home / 13,170.07-19,763.20-11,939.68

Finding the Fourth Proportional to 13,170.07, 19,763.20 and 11,939.68

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Solution

The fourth proportional to 13,170.07, 19,763.20 and 11,939.68 is: 17,916.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,170.07 : 19,763.20 = 11,939.68 : x
  2. Step 2: Convert to fraction form
    13,170.07/19,763.20 = 11,939.68/x
  3. Step 3: Cross multiply
    13,170.07x = 19,763.20 × 11,939.68
  4. Step 4: Simplify right side
    13,170.07x = 235,966,283.78
  5. Step 5: Solve for x
    x = 235,966,283.78/13,170.07
  6. Step 6: Final answer
    x = 17,916.86

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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.