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Finding the Fourth Proportional to 8,897.89, 12,278.92 and 4,918.92

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Solution

The fourth proportional to 8,897.89, 12,278.92 and 4,918.92 is: 6,788.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,897.89 : 12,278.92 = 4,918.92 : x
  2. Step 2: Convert to fraction form
    8,897.89/12,278.92 = 4,918.92/x
  3. Step 3: Cross multiply
    8,897.89x = 12,278.92 × 4,918.92
  4. Step 4: Simplify right side
    8,897.89x = 60,399,031.32
  5. Step 5: Solve for x
    x = 60,399,031.32/8,897.89
  6. Step 6: Final answer
    x = 6,788.02

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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.