Home / 13,687.11-18,888.12-7,718.83

Finding the Fourth Proportional to 13,687.11, 18,888.12 and 7,718.83

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Solution

The fourth proportional to 13,687.11, 18,888.12 and 7,718.83 is: 10,651.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.11 : 18,888.12 = 7,718.83 : x
  2. Step 2: Convert to fraction form
    13,687.11/18,888.12 = 7,718.83/x
  3. Step 3: Cross multiply
    13,687.11x = 18,888.12 × 7,718.83
  4. Step 4: Simplify right side
    13,687.11x = 145,794,140.08
  5. Step 5: Solve for x
    x = 145,794,140.08/13,687.11
  6. Step 6: Final answer
    x = 10,651.93

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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.