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Finding the Fourth Proportional to 18,539, 27,818.30 and 10,111.58

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Solution

The fourth proportional to 18,539, 27,818.30 and 10,111.58 is: 15,172.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,539 : 27,818.30 = 10,111.58 : x
  2. Step 2: Convert to fraction form
    18,539/27,818.30 = 10,111.58/x
  3. Step 3: Cross multiply
    18,539x = 27,818.30 × 10,111.58
  4. Step 4: Simplify right side
    18,539x = 281,286,965.91
  5. Step 5: Solve for x
    x = 281,286,965.91/18,539
  6. Step 6: Final answer
    x = 15,172.72

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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.