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Finding the Fourth Proportional to 18,698.81, 28,044.17 and 5,551.30

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Solution

The fourth proportional to 18,698.81, 28,044.17 and 5,551.30 is: 8,325.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.81 : 28,044.17 = 5,551.30 : x
  2. Step 2: Convert to fraction form
    18,698.81/28,044.17 = 5,551.30/x
  3. Step 3: Cross multiply
    18,698.81x = 28,044.17 × 5,551.30
  4. Step 4: Simplify right side
    18,698.81x = 155,681,432.94
  5. Step 5: Solve for x
    x = 155,681,432.94/18,698.81
  6. Step 6: Final answer
    x = 8,325.74

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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.