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Finding the Fourth Proportional to 18,772.77, 28,154.72 and 6,920.11

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Solution

The fourth proportional to 18,772.77, 28,154.72 and 6,920.11 is: 10,378.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.77 : 28,154.72 = 6,920.11 : x
  2. Step 2: Convert to fraction form
    18,772.77/28,154.72 = 6,920.11/x
  3. Step 3: Cross multiply
    18,772.77x = 28,154.72 × 6,920.11
  4. Step 4: Simplify right side
    18,772.77x = 194,833,618.65
  5. Step 5: Solve for x
    x = 194,833,618.65/18,772.77
  6. Step 6: Final answer
    x = 10,378.52

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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.