Home / 21,086.78-31,645.74-9,993.44

Finding the Fourth Proportional to 21,086.78, 31,645.74 and 9,993.44

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Solution

The fourth proportional to 21,086.78, 31,645.74 and 9,993.44 is: 14,997.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.78 : 31,645.74 = 9,993.44 : x
  2. Step 2: Convert to fraction form
    21,086.78/31,645.74 = 9,993.44/x
  3. Step 3: Cross multiply
    21,086.78x = 31,645.74 × 9,993.44
  4. Step 4: Simplify right side
    21,086.78x = 316,249,803.95
  5. Step 5: Solve for x
    x = 316,249,803.95/21,086.78
  6. Step 6: Final answer
    x = 14,997.54

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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.