Home / 20,915.46-31,371.64-6,875.32

Finding the Fourth Proportional to 20,915.46, 31,371.64 and 6,875.32

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Solution

The fourth proportional to 20,915.46, 31,371.64 and 6,875.32 is: 10,312.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.46 : 31,371.64 = 6,875.32 : x
  2. Step 2: Convert to fraction form
    20,915.46/31,371.64 = 6,875.32/x
  3. Step 3: Cross multiply
    20,915.46x = 31,371.64 × 6,875.32
  4. Step 4: Simplify right side
    20,915.46x = 215,690,063.92
  5. Step 5: Solve for x
    x = 215,690,063.92/20,915.46
  6. Step 6: Final answer
    x = 10,312.47

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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.