Home / 20,915.64-31,345.76-15,342.87

Finding the Fourth Proportional to 20,915.64, 31,345.76 and 15,342.87

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Solution

The fourth proportional to 20,915.64, 31,345.76 and 15,342.87 is: 22,993.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.64 : 31,345.76 = 15,342.87 : x
  2. Step 2: Convert to fraction form
    20,915.64/31,345.76 = 15,342.87/x
  3. Step 3: Cross multiply
    20,915.64x = 31,345.76 × 15,342.87
  4. Step 4: Simplify right side
    20,915.64x = 480,933,920.73
  5. Step 5: Solve for x
    x = 480,933,920.73/20,915.64
  6. Step 6: Final answer
    x = 22,993.99

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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.