Home / 20,908.35-31,362.26-5,113.52

Finding the Fourth Proportional to 20,908.35, 31,362.26 and 5,113.52

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Solution

The fourth proportional to 20,908.35, 31,362.26 and 5,113.52 is: 7,670.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.35 : 31,362.26 = 5,113.52 : x
  2. Step 2: Convert to fraction form
    20,908.35/31,362.26 = 5,113.52/x
  3. Step 3: Cross multiply
    20,908.35x = 31,362.26 × 5,113.52
  4. Step 4: Simplify right side
    20,908.35x = 160,371,478.98
  5. Step 5: Solve for x
    x = 160,371,478.98/20,908.35
  6. Step 6: Final answer
    x = 7,670.21

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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.