Home / 11,868.89-16,378.61-6,491.14

Finding the Fourth Proportional to 11,868.89, 16,378.61 and 6,491.14

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Solution

The fourth proportional to 11,868.89, 16,378.61 and 6,491.14 is: 8,957.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,868.89 : 16,378.61 = 6,491.14 : x
  2. Step 2: Convert to fraction form
    11,868.89/16,378.61 = 6,491.14/x
  3. Step 3: Cross multiply
    11,868.89x = 16,378.61 × 6,491.14
  4. Step 4: Simplify right side
    11,868.89x = 106,315,777.11
  5. Step 5: Solve for x
    x = 106,315,777.11/11,868.89
  6. Step 6: Final answer
    x = 8,957.52

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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.