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Finding the Fourth Proportional to 18,925.92, 28,389.66 and 7,078.50

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Solution

The fourth proportional to 18,925.92, 28,389.66 and 7,078.50 is: 10,618.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,925.92 : 28,389.66 = 7,078.50 : x
  2. Step 2: Convert to fraction form
    18,925.92/28,389.66 = 7,078.50/x
  3. Step 3: Cross multiply
    18,925.92x = 28,389.66 × 7,078.50
  4. Step 4: Simplify right side
    18,925.92x = 200,956,030.97
  5. Step 5: Solve for x
    x = 200,956,030.97/18,925.92
  6. Step 6: Final answer
    x = 10,618.04

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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.