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Finding the Fourth Proportional to 8,721.64, 12,036.18 and 4,996.36

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Solution

The fourth proportional to 8,721.64, 12,036.18 and 4,996.36 is: 6,895.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.64 : 12,036.18 = 4,996.36 : x
  2. Step 2: Convert to fraction form
    8,721.64/12,036.18 = 4,996.36/x
  3. Step 3: Cross multiply
    8,721.64x = 12,036.18 × 4,996.36
  4. Step 4: Simplify right side
    8,721.64x = 60,137,088.30
  5. Step 5: Solve for x
    x = 60,137,088.30/8,721.64
  6. Step 6: Final answer
    x = 6,895.16

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.