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Finding the Fourth Proportional to 7,903.71, 11,855.13 and 5,692.85

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Solution

The fourth proportional to 7,903.71, 11,855.13 and 5,692.85 is: 8,538.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,903.71 : 11,855.13 = 5,692.85 : x
  2. Step 2: Convert to fraction form
    7,903.71/11,855.13 = 5,692.85/x
  3. Step 3: Cross multiply
    7,903.71x = 11,855.13 × 5,692.85
  4. Step 4: Simplify right side
    7,903.71x = 67,489,417.54
  5. Step 5: Solve for x
    x = 67,489,417.54/7,903.71
  6. Step 6: Final answer
    x = 8,538.95

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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.