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Finding the Fourth Proportional to 15,203.10, 20,982.90 and 11,235.72

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Solution

The fourth proportional to 15,203.10, 20,982.90 and 11,235.72 is: 15,507.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,203.10 : 20,982.90 = 11,235.72 : x
  2. Step 2: Convert to fraction form
    15,203.10/20,982.90 = 11,235.72/x
  3. Step 3: Cross multiply
    15,203.10x = 20,982.90 × 11,235.72
  4. Step 4: Simplify right side
    15,203.10x = 235,757,989.19
  5. Step 5: Solve for x
    x = 235,757,989.19/15,203.10
  6. Step 6: Final answer
    x = 15,507.23

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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.