Home / 13,687.26-18,888.38-7,718.88

Finding the Fourth Proportional to 13,687.26, 18,888.38 and 7,718.88

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Solution

The fourth proportional to 13,687.26, 18,888.38 and 7,718.88 is: 10,652.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.26 : 18,888.38 = 7,718.88 : x
  2. Step 2: Convert to fraction form
    13,687.26/18,888.38 = 7,718.88/x
  3. Step 3: Cross multiply
    13,687.26x = 18,888.38 × 7,718.88
  4. Step 4: Simplify right side
    13,687.26x = 145,797,199.80
  5. Step 5: Solve for x
    x = 145,797,199.80/13,687.26
  6. Step 6: Final answer
    x = 10,652.04

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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.