Home / 20,913.35-31,342.34-15,340.61

Finding the Fourth Proportional to 20,913.35, 31,342.34 and 15,340.61

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Solution

The fourth proportional to 20,913.35, 31,342.34 and 15,340.61 is: 22,990.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.35 : 31,342.34 = 15,340.61 : x
  2. Step 2: Convert to fraction form
    20,913.35/31,342.34 = 15,340.61/x
  3. Step 3: Cross multiply
    20,913.35x = 31,342.34 × 15,340.61
  4. Step 4: Simplify right side
    20,913.35x = 480,810,381.01
  5. Step 5: Solve for x
    x = 480,810,381.01/20,913.35
  6. Step 6: Final answer
    x = 22,990.60

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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.