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Finding the Fourth Proportional to 18,939.29, 28,408.92 and 5,088.29

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Solution

The fourth proportional to 18,939.29, 28,408.92 and 5,088.29 is: 7,632.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.29 : 28,408.92 = 5,088.29 : x
  2. Step 2: Convert to fraction form
    18,939.29/28,408.92 = 5,088.29/x
  3. Step 3: Cross multiply
    18,939.29x = 28,408.92 × 5,088.29
  4. Step 4: Simplify right side
    18,939.29x = 144,552,823.55
  5. Step 5: Solve for x
    x = 144,552,823.55/18,939.29
  6. Step 6: Final answer
    x = 7,632.43

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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.