Home / 18,815.60-28,255.80-13,307.60

Finding the Fourth Proportional to 18,815.60, 28,255.80 and 13,307.60

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Solution

The fourth proportional to 18,815.60, 28,255.80 and 13,307.60 is: 19,984.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.60 : 28,255.80 = 13,307.60 : x
  2. Step 2: Convert to fraction form
    18,815.60/28,255.80 = 13,307.60/x
  3. Step 3: Cross multiply
    18,815.60x = 28,255.80 × 13,307.60
  4. Step 4: Simplify right side
    18,815.60x = 376,016,884.08
  5. Step 5: Solve for x
    x = 376,016,884.08/18,815.60
  6. Step 6: Final answer
    x = 19,984.32

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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.