Home / 13,139.40-18,130.92-7,833.18

Finding the Fourth Proportional to 13,139.40, 18,130.92 and 7,833.18

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Solution

The fourth proportional to 13,139.40, 18,130.92 and 7,833.18 is: 10,808.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.40 : 18,130.92 = 7,833.18 : x
  2. Step 2: Convert to fraction form
    13,139.40/18,130.92 = 7,833.18/x
  3. Step 3: Cross multiply
    13,139.40x = 18,130.92 × 7,833.18
  4. Step 4: Simplify right side
    13,139.40x = 142,022,759.93
  5. Step 5: Solve for x
    x = 142,022,759.93/13,139.40
  6. Step 6: Final answer
    x = 10,808.92

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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.