Home / 18,836.40-28,266.88-13,918.34

Finding the Fourth Proportional to 18,836.40, 28,266.88 and 13,918.34

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Solution

The fourth proportional to 18,836.40, 28,266.88 and 13,918.34 is: 20,886.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,836.40 : 28,266.88 = 13,918.34 : x
  2. Step 2: Convert to fraction form
    18,836.40/28,266.88 = 13,918.34/x
  3. Step 3: Cross multiply
    18,836.40x = 28,266.88 × 13,918.34
  4. Step 4: Simplify right side
    18,836.40x = 393,428,046.58
  5. Step 5: Solve for x
    x = 393,428,046.58/18,836.40
  6. Step 6: Final answer
    x = 20,886.58

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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.