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Finding the Fourth Proportional to 18,157.72, 25,049.08 and 15,533.32

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Solution

The fourth proportional to 18,157.72, 25,049.08 and 15,533.32 is: 21,428.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,157.72 : 25,049.08 = 15,533.32 : x
  2. Step 2: Convert to fraction form
    18,157.72/25,049.08 = 15,533.32/x
  3. Step 3: Cross multiply
    18,157.72x = 25,049.08 × 15,533.32
  4. Step 4: Simplify right side
    18,157.72x = 389,095,375.35
  5. Step 5: Solve for x
    x = 389,095,375.35/18,157.72
  6. Step 6: Final answer
    x = 21,428.65

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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.