Home / 13,684.18-18,884.19-7,715.83

Finding the Fourth Proportional to 13,684.18, 18,884.19 and 7,715.83

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Solution

The fourth proportional to 13,684.18, 18,884.19 and 7,715.83 is: 10,647.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,684.18 : 18,884.19 = 7,715.83 : x
  2. Step 2: Convert to fraction form
    13,684.18/18,884.19 = 7,715.83/x
  3. Step 3: Cross multiply
    13,684.18x = 18,884.19 × 7,715.83
  4. Step 4: Simplify right side
    13,684.18x = 145,707,199.73
  5. Step 5: Solve for x
    x = 145,707,199.73/13,684.18
  6. Step 6: Final answer
    x = 10,647.86

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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.