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Finding the Fourth Proportional to 11,424.60, 15,765.98 and 6,645.69

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Solution

The fourth proportional to 11,424.60, 15,765.98 and 6,645.69 is: 9,171.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,424.60 : 15,765.98 = 6,645.69 : x
  2. Step 2: Convert to fraction form
    11,424.60/15,765.98 = 6,645.69/x
  3. Step 3: Cross multiply
    11,424.60x = 15,765.98 × 6,645.69
  4. Step 4: Simplify right side
    11,424.60x = 104,775,782.40
  5. Step 5: Solve for x
    x = 104,775,782.40/11,424.60
  6. Step 6: Final answer
    x = 9,171.07

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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.