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Finding the Fourth Proportional to 18,893.32, 28,339.66 and 6,581

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Solution

The fourth proportional to 18,893.32, 28,339.66 and 6,581 is: 9,871.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,893.32 : 28,339.66 = 6,581 : x
  2. Step 2: Convert to fraction form
    18,893.32/28,339.66 = 6,581/x
  3. Step 3: Cross multiply
    18,893.32x = 28,339.66 × 6,581
  4. Step 4: Simplify right side
    18,893.32x = 186,503,302.46
  5. Step 5: Solve for x
    x = 186,503,302.46/18,893.32
  6. Step 6: Final answer
    x = 9,871.39

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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.