Home / 21,140.82-31,688.42-13,750.61

Finding the Fourth Proportional to 21,140.82, 31,688.42 and 13,750.61

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Solution

The fourth proportional to 21,140.82, 31,688.42 and 13,750.61 is: 20,611.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.82 : 31,688.42 = 13,750.61 : x
  2. Step 2: Convert to fraction form
    21,140.82/31,688.42 = 13,750.61/x
  3. Step 3: Cross multiply
    21,140.82x = 31,688.42 × 13,750.61
  4. Step 4: Simplify right side
    21,140.82x = 435,734,877.74
  5. Step 5: Solve for x
    x = 435,734,877.74/21,140.82
  6. Step 6: Final answer
    x = 20,611.07

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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.