Home / 20,805.97-31,194.37-7,656.63

Finding the Fourth Proportional to 20,805.97, 31,194.37 and 7,656.63

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Solution

The fourth proportional to 20,805.97, 31,194.37 and 7,656.63 is: 11,479.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.97 : 31,194.37 = 7,656.63 : x
  2. Step 2: Convert to fraction form
    20,805.97/31,194.37 = 7,656.63/x
  3. Step 3: Cross multiply
    20,805.97x = 31,194.37 × 7,656.63
  4. Step 4: Simplify right side
    20,805.97x = 238,843,710.89
  5. Step 5: Solve for x
    x = 238,843,710.89/20,805.97
  6. Step 6: Final answer
    x = 11,479.58

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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.