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Finding the Fourth Proportional to 18,339.75, 25,310.88 and 10,381.91

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Solution

The fourth proportional to 18,339.75, 25,310.88 and 10,381.91 is: 14,328.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,339.75 : 25,310.88 = 10,381.91 : x
  2. Step 2: Convert to fraction form
    18,339.75/25,310.88 = 10,381.91/x
  3. Step 3: Cross multiply
    18,339.75x = 25,310.88 × 10,381.91
  4. Step 4: Simplify right side
    18,339.75x = 262,775,151.63
  5. Step 5: Solve for x
    x = 262,775,151.63/18,339.75
  6. Step 6: Final answer
    x = 14,328.18

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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.