Home / 20,955.90-31,435.39-6,915.36

Finding the Fourth Proportional to 20,955.90, 31,435.39 and 6,915.36

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Solution

The fourth proportional to 20,955.90, 31,435.39 and 6,915.36 is: 10,373.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,955.90 : 31,435.39 = 6,915.36 : x
  2. Step 2: Convert to fraction form
    20,955.90/31,435.39 = 6,915.36/x
  3. Step 3: Cross multiply
    20,955.90x = 31,435.39 × 6,915.36
  4. Step 4: Simplify right side
    20,955.90x = 217,387,120.91
  5. Step 5: Solve for x
    x = 217,387,120.91/20,955.90
  6. Step 6: Final answer
    x = 10,373.55

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1.5x scale

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.