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Finding the Fourth Proportional to 8,123.89, 12,187.95 and 2,858.68

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Solution

The fourth proportional to 8,123.89, 12,187.95 and 2,858.68 is: 4,288.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,123.89 : 12,187.95 = 2,858.68 : x
  2. Step 2: Convert to fraction form
    8,123.89/12,187.95 = 2,858.68/x
  3. Step 3: Cross multiply
    8,123.89x = 12,187.95 × 2,858.68
  4. Step 4: Simplify right side
    8,123.89x = 34,841,448.91
  5. Step 5: Solve for x
    x = 34,841,448.91/8,123.89
  6. Step 6: Final answer
    x = 4,288.77

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1.5x scale

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.