Home / 13,079.70-18,049.95-7,111.33

Finding the Fourth Proportional to 13,079.70, 18,049.95 and 7,111.33

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Solution

The fourth proportional to 13,079.70, 18,049.95 and 7,111.33 is: 9,813.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,079.70 : 18,049.95 = 7,111.33 : x
  2. Step 2: Convert to fraction form
    13,079.70/18,049.95 = 7,111.33/x
  3. Step 3: Cross multiply
    13,079.70x = 18,049.95 × 7,111.33
  4. Step 4: Simplify right side
    13,079.70x = 128,359,150.93
  5. Step 5: Solve for x
    x = 128,359,150.93/13,079.70
  6. Step 6: Final answer
    x = 9,813.62

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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.