Home / 9,215.42-12,715.63-5,181.09

Finding the Fourth Proportional to 9,215.42, 12,715.63 and 5,181.09

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Solution

The fourth proportional to 9,215.42, 12,715.63 and 5,181.09 is: 7,148.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,215.42 : 12,715.63 = 5,181.09 : x
  2. Step 2: Convert to fraction form
    9,215.42/12,715.63 = 5,181.09/x
  3. Step 3: Cross multiply
    9,215.42x = 12,715.63 × 5,181.09
  4. Step 4: Simplify right side
    9,215.42x = 65,880,794.92
  5. Step 5: Solve for x
    x = 65,880,794.92/9,215.42
  6. Step 6: Final answer
    x = 7,148.97

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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.