Home / 8,639.12-11,916.58-6,518

Finding the Fourth Proportional to 8,639.12, 11,916.58 and 6,518

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Solution

The fourth proportional to 8,639.12, 11,916.58 and 6,518 is: 8,990.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.12 : 11,916.58 = 6,518 : x
  2. Step 2: Convert to fraction form
    8,639.12/11,916.58 = 6,518/x
  3. Step 3: Cross multiply
    8,639.12x = 11,916.58 × 6,518
  4. Step 4: Simplify right side
    8,639.12x = 77,672,268.44
  5. Step 5: Solve for x
    x = 77,672,268.44/8,639.12
  6. Step 6: Final answer
    x = 8,990.76

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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.