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Finding the Fourth Proportional to 11,358.80, 15,674.44 and 6,642.80

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Solution

The fourth proportional to 11,358.80, 15,674.44 and 6,642.80 is: 9,166.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,358.80 : 15,674.44 = 6,642.80 : x
  2. Step 2: Convert to fraction form
    11,358.80/15,674.44 = 6,642.80/x
  3. Step 3: Cross multiply
    11,358.80x = 15,674.44 × 6,642.80
  4. Step 4: Simplify right side
    11,358.80x = 104,122,170.03
  5. Step 5: Solve for x
    x = 104,122,170.03/11,358.80
  6. Step 6: Final answer
    x = 9,166.65

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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.