Home / 10,211.09-15,317.70-2,815.55

Finding the Fourth Proportional to 10,211.09, 15,317.70 and 2,815.55

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Solution

The fourth proportional to 10,211.09, 15,317.70 and 2,815.55 is: 4,223.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,211.09 : 15,317.70 = 2,815.55 : x
  2. Step 2: Convert to fraction form
    10,211.09/15,317.70 = 2,815.55/x
  3. Step 3: Cross multiply
    10,211.09x = 15,317.70 × 2,815.55
  4. Step 4: Simplify right side
    10,211.09x = 43,127,750.24
  5. Step 5: Solve for x
    x = 43,127,750.24/10,211.09
  6. Step 6: Final answer
    x = 4,223.62

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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.