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Finding the Fourth Proportional to 8,618.58, 12,915.48 and 4,913.17

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Solution

The fourth proportional to 8,618.58, 12,915.48 and 4,913.17 is: 7,362.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.58 : 12,915.48 = 4,913.17 : x
  2. Step 2: Convert to fraction form
    8,618.58/12,915.48 = 4,913.17/x
  3. Step 3: Cross multiply
    8,618.58x = 12,915.48 × 4,913.17
  4. Step 4: Simplify right side
    8,618.58x = 63,455,948.87
  5. Step 5: Solve for x
    x = 63,455,948.87/8,618.58
  6. Step 6: Final answer
    x = 7,362.69

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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.