Home / 18,871.11-28,283.99-13,316.13

Finding the Fourth Proportional to 18,871.11, 28,283.99 and 13,316.13

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Solution

The fourth proportional to 18,871.11, 28,283.99 and 13,316.13 is: 19,958.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.11 : 28,283.99 = 13,316.13 : x
  2. Step 2: Convert to fraction form
    18,871.11/28,283.99 = 13,316.13/x
  3. Step 3: Cross multiply
    18,871.11x = 28,283.99 × 13,316.13
  4. Step 4: Simplify right side
    18,871.11x = 376,633,221.18
  5. Step 5: Solve for x
    x = 376,633,221.18/18,871.11
  6. Step 6: Final answer
    x = 19,958.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.