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Finding the Fourth Proportional to 15,160.16, 20,919.60 and 11,183.48

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Solution

The fourth proportional to 15,160.16, 20,919.60 and 11,183.48 is: 15,432.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,160.16 : 20,919.60 = 11,183.48 : x
  2. Step 2: Convert to fraction form
    15,160.16/20,919.60 = 11,183.48/x
  3. Step 3: Cross multiply
    15,160.16x = 20,919.60 × 11,183.48
  4. Step 4: Simplify right side
    15,160.16x = 233,953,928.21
  5. Step 5: Solve for x
    x = 233,953,928.21/15,160.16
  6. Step 6: Final answer
    x = 15,432.15

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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.