Home / 10,215.91-15,316.07-5,282.40

Finding the Fourth Proportional to 10,215.91, 15,316.07 and 5,282.40

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Solution

The fourth proportional to 10,215.91, 15,316.07 and 5,282.40 is: 7,919.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,215.91 : 15,316.07 = 5,282.40 : x
  2. Step 2: Convert to fraction form
    10,215.91/15,316.07 = 5,282.40/x
  3. Step 3: Cross multiply
    10,215.91x = 15,316.07 × 5,282.40
  4. Step 4: Simplify right side
    10,215.91x = 80,905,608.17
  5. Step 5: Solve for x
    x = 80,905,608.17/10,215.91
  6. Step 6: Final answer
    x = 7,919.57

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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.