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Finding the Fourth Proportional to 11,281.92, 16,904.38 and 7,989.10

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Solution

The fourth proportional to 11,281.92, 16,904.38 and 7,989.10 is: 11,970.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,281.92 : 16,904.38 = 7,989.10 : x
  2. Step 2: Convert to fraction form
    11,281.92/16,904.38 = 7,989.10/x
  3. Step 3: Cross multiply
    11,281.92x = 16,904.38 × 7,989.10
  4. Step 4: Simplify right side
    11,281.92x = 135,050,782.26
  5. Step 5: Solve for x
    x = 135,050,782.26/11,281.92
  6. Step 6: Final answer
    x = 11,970.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.