Home / 20,932.36-31,397.88-5,137.45

Finding the Fourth Proportional to 20,932.36, 31,397.88 and 5,137.45

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Solution

The fourth proportional to 20,932.36, 31,397.88 and 5,137.45 is: 7,706.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.36 : 31,397.88 = 5,137.45 : x
  2. Step 2: Convert to fraction form
    20,932.36/31,397.88 = 5,137.45/x
  3. Step 3: Cross multiply
    20,932.36x = 31,397.88 × 5,137.45
  4. Step 4: Simplify right side
    20,932.36x = 161,305,038.61
  5. Step 5: Solve for x
    x = 161,305,038.61/20,932.36
  6. Step 6: Final answer
    x = 7,706.01

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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.