Home / 13,815.20-20,723.28-4,455.20

Finding the Fourth Proportional to 13,815.20, 20,723.28 and 4,455.20

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Solution

The fourth proportional to 13,815.20, 20,723.28 and 4,455.20 is: 6,682.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.20 : 20,723.28 = 4,455.20 : x
  2. Step 2: Convert to fraction form
    13,815.20/20,723.28 = 4,455.20/x
  3. Step 3: Cross multiply
    13,815.20x = 20,723.28 × 4,455.20
  4. Step 4: Simplify right side
    13,815.20x = 92,326,357.06
  5. Step 5: Solve for x
    x = 92,326,357.06/13,815.20
  6. Step 6: Final answer
    x = 6,682.95

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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.