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Finding the Fourth Proportional to 8,956.50, 12,360.18 and 4,977.78

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Solution

The fourth proportional to 8,956.50, 12,360.18 and 4,977.78 is: 6,869.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,956.50 : 12,360.18 = 4,977.78 : x
  2. Step 2: Convert to fraction form
    8,956.50/12,360.18 = 4,977.78/x
  3. Step 3: Cross multiply
    8,956.50x = 12,360.18 × 4,977.78
  4. Step 4: Simplify right side
    8,956.50x = 61,526,256.80
  5. Step 5: Solve for x
    x = 61,526,256.80/8,956.50
  6. Step 6: Final answer
    x = 6,869.45

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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.