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Finding the Fourth Proportional to 8,312.87, 12,458.53 and 3,376.77

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Solution

The fourth proportional to 8,312.87, 12,458.53 and 3,376.77 is: 5,060.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,312.87 : 12,458.53 = 3,376.77 : x
  2. Step 2: Convert to fraction form
    8,312.87/12,458.53 = 3,376.77/x
  3. Step 3: Cross multiply
    8,312.87x = 12,458.53 × 3,376.77
  4. Step 4: Simplify right side
    8,312.87x = 42,069,573.46
  5. Step 5: Solve for x
    x = 42,069,573.46/8,312.87
  6. Step 6: Final answer
    x = 5,060.78

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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.