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Finding the Fourth Proportional to 18,818.88, 28,235.10 and 7,132

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Solution

The fourth proportional to 18,818.88, 28,235.10 and 7,132 is: 10,700.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,818.88 : 28,235.10 = 7,132 : x
  2. Step 2: Convert to fraction form
    18,818.88/28,235.10 = 7,132/x
  3. Step 3: Cross multiply
    18,818.88x = 28,235.10 × 7,132
  4. Step 4: Simplify right side
    18,818.88x = 201,372,733.20
  5. Step 5: Solve for x
    x = 201,372,733.20/18,818.88
  6. Step 6: Final answer
    x = 10,700.57

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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.