Home / 11,977.90-16,530-6,672.72

Finding the Fourth Proportional to 11,977.90, 16,530 and 6,672.72

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Solution

The fourth proportional to 11,977.90, 16,530 and 6,672.72 is: 9,208.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,977.90 : 16,530 = 6,672.72 : x
  2. Step 2: Convert to fraction form
    11,977.90/16,530 = 6,672.72/x
  3. Step 3: Cross multiply
    11,977.90x = 16,530 × 6,672.72
  4. Step 4: Simplify right side
    11,977.90x = 110,300,061.60
  5. Step 5: Solve for x
    x = 110,300,061.60/11,977.90
  6. Step 6: Final answer
    x = 9,208.63

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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.