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Finding the Fourth Proportional to 8,897.40, 12,278.34 and 4,918.80

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Solution

The fourth proportional to 8,897.40, 12,278.34 and 4,918.80 is: 6,787.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,897.40 : 12,278.34 = 4,918.80 : x
  2. Step 2: Convert to fraction form
    8,897.40/12,278.34 = 4,918.80/x
  3. Step 3: Cross multiply
    8,897.40x = 12,278.34 × 4,918.80
  4. Step 4: Simplify right side
    8,897.40x = 60,394,698.79
  5. Step 5: Solve for x
    x = 60,394,698.79/8,897.40
  6. Step 6: Final answer
    x = 6,787.90

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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.