Home / 20,772.25-31,108.71-11,980.51

Finding the Fourth Proportional to 20,772.25, 31,108.71 and 11,980.51

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Solution

The fourth proportional to 20,772.25, 31,108.71 and 11,980.51 is: 17,942.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.25 : 31,108.71 = 11,980.51 : x
  2. Step 2: Convert to fraction form
    20,772.25/31,108.71 = 11,980.51/x
  3. Step 3: Cross multiply
    20,772.25x = 31,108.71 × 11,980.51
  4. Step 4: Simplify right side
    20,772.25x = 372,698,211.24
  5. Step 5: Solve for x
    x = 372,698,211.24/20,772.25
  6. Step 6: Final answer
    x = 17,942.12

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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.