Home / 11,116.40-15,340.86-6,642.72

Finding the Fourth Proportional to 11,116.40, 15,340.86 and 6,642.72

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Solution

The fourth proportional to 11,116.40, 15,340.86 and 6,642.72 is: 9,167.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,116.40 : 15,340.86 = 6,642.72 : x
  2. Step 2: Convert to fraction form
    11,116.40/15,340.86 = 6,642.72/x
  3. Step 3: Cross multiply
    11,116.40x = 15,340.86 × 6,642.72
  4. Step 4: Simplify right side
    11,116.40x = 101,905,037.54
  5. Step 5: Solve for x
    x = 101,905,037.54/11,116.40
  6. Step 6: Final answer
    x = 9,167.09

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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.