Home / 13,687.41-18,888.60-7,399.80

Finding the Fourth Proportional to 13,687.41, 18,888.60 and 7,399.80

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Solution

The fourth proportional to 13,687.41, 18,888.60 and 7,399.80 is: 10,211.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.41 : 18,888.60 = 7,399.80 : x
  2. Step 2: Convert to fraction form
    13,687.41/18,888.60 = 7,399.80/x
  3. Step 3: Cross multiply
    13,687.41x = 18,888.60 × 7,399.80
  4. Step 4: Simplify right side
    13,687.41x = 139,771,862.28
  5. Step 5: Solve for x
    x = 139,771,862.28/13,687.41
  6. Step 6: Final answer
    x = 10,211.71

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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.