Home / 13,711.80-18,889.86-11,306.10

Finding the Fourth Proportional to 13,711.80, 18,889.86 and 11,306.10

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Solution

The fourth proportional to 13,711.80, 18,889.86 and 11,306.10 is: 15,575.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.80 : 18,889.86 = 11,306.10 : x
  2. Step 2: Convert to fraction form
    13,711.80/18,889.86 = 11,306.10/x
  3. Step 3: Cross multiply
    13,711.80x = 18,889.86 × 11,306.10
  4. Step 4: Simplify right side
    13,711.80x = 213,570,646.15
  5. Step 5: Solve for x
    x = 213,570,646.15/13,711.80
  6. Step 6: Final answer
    x = 15,575.68

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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.