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Finding the Fourth Proportional to 9,015.72, 13,523.72 and 3,172.40

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Solution

The fourth proportional to 9,015.72, 13,523.72 and 3,172.40 is: 4,758.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,015.72 : 13,523.72 = 3,172.40 : x
  2. Step 2: Convert to fraction form
    9,015.72/13,523.72 = 3,172.40/x
  3. Step 3: Cross multiply
    9,015.72x = 13,523.72 × 3,172.40
  4. Step 4: Simplify right side
    9,015.72x = 42,902,649.33
  5. Step 5: Solve for x
    x = 42,902,649.33/9,015.72
  6. Step 6: Final answer
    x = 4,758.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.