Home / 18,872.08-28,306.38-6,390.67

Finding the Fourth Proportional to 18,872.08, 28,306.38 and 6,390.67

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Solution

The fourth proportional to 18,872.08, 28,306.38 and 6,390.67 is: 9,585.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,872.08 : 28,306.38 = 6,390.67 : x
  2. Step 2: Convert to fraction form
    18,872.08/28,306.38 = 6,390.67/x
  3. Step 3: Cross multiply
    18,872.08x = 28,306.38 × 6,390.67
  4. Step 4: Simplify right side
    18,872.08x = 180,896,733.47
  5. Step 5: Solve for x
    x = 180,896,733.47/18,872.08
  6. Step 6: Final answer
    x = 9,585.42

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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.