Home / 13,030.11-17,981.55-7,061.78

Finding the Fourth Proportional to 13,030.11, 17,981.55 and 7,061.78

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Solution

The fourth proportional to 13,030.11, 17,981.55 and 7,061.78 is: 9,745.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,030.11 : 17,981.55 = 7,061.78 : x
  2. Step 2: Convert to fraction form
    13,030.11/17,981.55 = 7,061.78/x
  3. Step 3: Cross multiply
    13,030.11x = 17,981.55 × 7,061.78
  4. Step 4: Simplify right side
    13,030.11x = 126,981,744.54
  5. Step 5: Solve for x
    x = 126,981,744.54/13,030.11
  6. Step 6: Final answer
    x = 9,745.25

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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.