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Finding the Fourth Proportional to 28,118.30, 38,813.02 and 18,074.30

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Solution

The fourth proportional to 28,118.30, 38,813.02 and 18,074.30 is: 24,948.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,118.30 : 38,813.02 = 18,074.30 : x
  2. Step 2: Convert to fraction form
    28,118.30/38,813.02 = 18,074.30/x
  3. Step 3: Cross multiply
    28,118.30x = 38,813.02 × 18,074.30
  4. Step 4: Simplify right side
    28,118.30x = 701,518,167.39
  5. Step 5: Solve for x
    x = 701,518,167.39/28,118.30
  6. Step 6: Final answer
    x = 24,948.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.