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Finding the Fourth Proportional to 11,355.21, 15,660.22 and 7,950.48

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Solution

The fourth proportional to 11,355.21, 15,660.22 and 7,950.48 is: 10,964.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.21 : 15,660.22 = 7,950.48 : x
  2. Step 2: Convert to fraction form
    11,355.21/15,660.22 = 7,950.48/x
  3. Step 3: Cross multiply
    11,355.21x = 15,660.22 × 7,950.48
  4. Step 4: Simplify right side
    11,355.21x = 124,506,265.91
  5. Step 5: Solve for x
    x = 124,506,265.91/11,355.21
  6. Step 6: Final answer
    x = 10,964.68

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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.