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Finding the Fourth Proportional to 19,074.78, 28,614.12 and 5,223.78

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Solution

The fourth proportional to 19,074.78, 28,614.12 and 5,223.78 is: 7,836.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,074.78 : 28,614.12 = 5,223.78 : x
  2. Step 2: Convert to fraction form
    19,074.78/28,614.12 = 5,223.78/x
  3. Step 3: Cross multiply
    19,074.78x = 28,614.12 × 5,223.78
  4. Step 4: Simplify right side
    19,074.78x = 149,473,867.77
  5. Step 5: Solve for x
    x = 149,473,867.77/19,074.78
  6. Step 6: Final answer
    x = 7,836.20

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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.