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Finding the Fourth Proportional to 8,897.66, 12,278.64 and 4,918.69

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Solution

The fourth proportional to 8,897.66, 12,278.64 and 4,918.69 is: 6,787.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,897.66 : 12,278.64 = 4,918.69 : x
  2. Step 2: Convert to fraction form
    8,897.66/12,278.64 = 4,918.69/x
  3. Step 3: Cross multiply
    8,897.66x = 12,278.64 × 4,918.69
  4. Step 4: Simplify right side
    8,897.66x = 60,394,823.78
  5. Step 5: Solve for x
    x = 60,394,823.78/8,897.66
  6. Step 6: Final answer
    x = 6,787.72

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1.5x scale

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.