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Finding the Fourth Proportional to 18,235.30, 25,152.20 and 11,165.20

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Solution

The fourth proportional to 18,235.30, 25,152.20 and 11,165.20 is: 15,400.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,235.30 : 25,152.20 = 11,165.20 : x
  2. Step 2: Convert to fraction form
    18,235.30/25,152.20 = 11,165.20/x
  3. Step 3: Cross multiply
    18,235.30x = 25,152.20 × 11,165.20
  4. Step 4: Simplify right side
    18,235.30x = 280,829,343.44
  5. Step 5: Solve for x
    x = 280,829,343.44/18,235.30
  6. Step 6: Final answer
    x = 15,400.31

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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.