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Finding the Fourth Proportional to 8,699.59, 11,985.73 and 8,284.87

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Solution

The fourth proportional to 8,699.59, 11,985.73 and 8,284.87 is: 11,414.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,699.59 : 11,985.73 = 8,284.87 : x
  2. Step 2: Convert to fraction form
    8,699.59/11,985.73 = 8,284.87/x
  3. Step 3: Cross multiply
    8,699.59x = 11,985.73 × 8,284.87
  4. Step 4: Simplify right side
    8,699.59x = 99,300,214.91
  5. Step 5: Solve for x
    x = 99,300,214.91/8,699.59
  6. Step 6: Final answer
    x = 11,414.36

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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.