Home / 15,103.39-20,842.65-8,815.75

Finding the Fourth Proportional to 15,103.39, 20,842.65 and 8,815.75

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Solution

The fourth proportional to 15,103.39, 20,842.65 and 8,815.75 is: 12,165.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,103.39 : 20,842.65 = 8,815.75 : x
  2. Step 2: Convert to fraction form
    15,103.39/20,842.65 = 8,815.75/x
  3. Step 3: Cross multiply
    15,103.39x = 20,842.65 × 8,815.75
  4. Step 4: Simplify right side
    15,103.39x = 183,743,591.74
  5. Step 5: Solve for x
    x = 183,743,591.74/15,103.39
  6. Step 6: Final answer
    x = 12,165.72

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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.