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Finding the Fourth Proportional to 8,578.36, 12,862.52 and 3,312.47

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Solution

The fourth proportional to 8,578.36, 12,862.52 and 3,312.47 is: 4,966.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,578.36 : 12,862.52 = 3,312.47 : x
  2. Step 2: Convert to fraction form
    8,578.36/12,862.52 = 3,312.47/x
  3. Step 3: Cross multiply
    8,578.36x = 12,862.52 × 3,312.47
  4. Step 4: Simplify right side
    8,578.36x = 42,606,712.78
  5. Step 5: Solve for x
    x = 42,606,712.78/8,578.36
  6. Step 6: Final answer
    x = 4,966.77

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.