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Finding the Fourth Proportional to 9,187.99, 12,679.71 and 5,209.27

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Solution

The fourth proportional to 9,187.99, 12,679.71 and 5,209.27 is: 7,188.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,187.99 : 12,679.71 = 5,209.27 : x
  2. Step 2: Convert to fraction form
    9,187.99/12,679.71 = 5,209.27/x
  3. Step 3: Cross multiply
    9,187.99x = 12,679.71 × 5,209.27
  4. Step 4: Simplify right side
    9,187.99x = 66,051,981.68
  5. Step 5: Solve for x
    x = 66,051,981.68/9,187.99
  6. Step 6: Final answer
    x = 7,188.95

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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.