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Finding the Fourth Proportional to 7,215.88, 9,956.19 and 4,072.08

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Solution

The fourth proportional to 7,215.88, 9,956.19 and 4,072.08 is: 5,618.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.88 : 9,956.19 = 4,072.08 : x
  2. Step 2: Convert to fraction form
    7,215.88/9,956.19 = 4,072.08/x
  3. Step 3: Cross multiply
    7,215.88x = 9,956.19 × 4,072.08
  4. Step 4: Simplify right side
    7,215.88x = 40,542,402.18
  5. Step 5: Solve for x
    x = 40,542,402.18/7,215.88
  6. Step 6: Final answer
    x = 5,618.50

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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.