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Finding the Fourth Proportional to 18,758.30, 28,124.96 and 10,328.78

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Solution

The fourth proportional to 18,758.30, 28,124.96 and 10,328.78 is: 15,486.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.30 : 28,124.96 = 10,328.78 : x
  2. Step 2: Convert to fraction form
    18,758.30/28,124.96 = 10,328.78/x
  3. Step 3: Cross multiply
    18,758.30x = 28,124.96 × 10,328.78
  4. Step 4: Simplify right side
    18,758.30x = 290,496,406.96
  5. Step 5: Solve for x
    x = 290,496,406.96/18,758.30
  6. Step 6: Final answer
    x = 15,486.28

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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.