Home / 11,947.30-16,487.55-6,642

Finding the Fourth Proportional to 11,947.30, 16,487.55 and 6,642

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Solution

The fourth proportional to 11,947.30, 16,487.55 and 6,642 is: 9,166.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,947.30 : 16,487.55 = 6,642 : x
  2. Step 2: Convert to fraction form
    11,947.30/16,487.55 = 6,642/x
  3. Step 3: Cross multiply
    11,947.30x = 16,487.55 × 6,642
  4. Step 4: Simplify right side
    11,947.30x = 109,510,307.10
  5. Step 5: Solve for x
    x = 109,510,307.10/11,947.30
  6. Step 6: Final answer
    x = 9,166.12

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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.