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Finding the Fourth Proportional to 18,925.65, 28,378.61 and 7,069.68

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Solution

The fourth proportional to 18,925.65, 28,378.61 and 7,069.68 is: 10,600.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,925.65 : 28,378.61 = 7,069.68 : x
  2. Step 2: Convert to fraction form
    18,925.65/28,378.61 = 7,069.68/x
  3. Step 3: Cross multiply
    18,925.65x = 28,378.61 × 7,069.68
  4. Step 4: Simplify right side
    18,925.65x = 200,627,656.20
  5. Step 5: Solve for x
    x = 200,627,656.20/18,925.65
  6. Step 6: Final answer
    x = 10,600.83

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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.