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Finding the Fourth Proportional to 8,666.37, 12,990.63 and 6,581.94

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Solution

The fourth proportional to 8,666.37, 12,990.63 and 6,581.94 is: 9,866.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.37 : 12,990.63 = 6,581.94 : x
  2. Step 2: Convert to fraction form
    8,666.37/12,990.63 = 6,581.94/x
  3. Step 3: Cross multiply
    8,666.37x = 12,990.63 × 6,581.94
  4. Step 4: Simplify right side
    8,666.37x = 85,503,547.22
  5. Step 5: Solve for x
    x = 85,503,547.22/8,666.37
  6. Step 6: Final answer
    x = 9,866.13

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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.