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Finding the Fourth Proportional to 15,152.13, 20,911.56 and 8,869.77

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Solution

The fourth proportional to 15,152.13, 20,911.56 and 8,869.77 is: 12,241.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,152.13 : 20,911.56 = 8,869.77 : x
  2. Step 2: Convert to fraction form
    15,152.13/20,911.56 = 8,869.77/x
  3. Step 3: Cross multiply
    15,152.13x = 20,911.56 × 8,869.77
  4. Step 4: Simplify right side
    15,152.13x = 185,480,727.54
  5. Step 5: Solve for x
    x = 185,480,727.54/15,152.13
  6. Step 6: Final answer
    x = 12,241.23

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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.