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Finding the Fourth Proportional to 5,866.80, 8,821.80 and 4,916.40

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Solution

The fourth proportional to 5,866.80, 8,821.80 and 4,916.40 is: 7,392.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,866.80 : 8,821.80 = 4,916.40 : x
  2. Step 2: Convert to fraction form
    5,866.80/8,821.80 = 4,916.40/x
  3. Step 3: Cross multiply
    5,866.80x = 8,821.80 × 4,916.40
  4. Step 4: Simplify right side
    5,866.80x = 43,371,497.52
  5. Step 5: Solve for x
    x = 43,371,497.52/5,866.80
  6. Step 6: Final answer
    x = 7,392.70

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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.