Home / 13,747.33-18,971.13-7,780.18

Finding the Fourth Proportional to 13,747.33, 18,971.13 and 7,780.18

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Solution

The fourth proportional to 13,747.33, 18,971.13 and 7,780.18 is: 10,736.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,747.33 : 18,971.13 = 7,780.18 : x
  2. Step 2: Convert to fraction form
    13,747.33/18,971.13 = 7,780.18/x
  3. Step 3: Cross multiply
    13,747.33x = 18,971.13 × 7,780.18
  4. Step 4: Simplify right side
    13,747.33x = 147,598,806.20
  5. Step 5: Solve for x
    x = 147,598,806.20/13,747.33
  6. Step 6: Final answer
    x = 10,736.54

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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.