Home / 18,679.28-28,019.52-7,585.72

Finding the Fourth Proportional to 18,679.28, 28,019.52 and 7,585.72

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Solution

The fourth proportional to 18,679.28, 28,019.52 and 7,585.72 is: 11,378.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.28 : 28,019.52 = 7,585.72 : x
  2. Step 2: Convert to fraction form
    18,679.28/28,019.52 = 7,585.72/x
  3. Step 3: Cross multiply
    18,679.28x = 28,019.52 × 7,585.72
  4. Step 4: Simplify right side
    18,679.28x = 212,548,163.21
  5. Step 5: Solve for x
    x = 212,548,163.21/18,679.28
  6. Step 6: Final answer
    x = 11,378.82

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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.