Home / 20,959.90-31,455.66-11,101.40

Finding the Fourth Proportional to 20,959.90, 31,455.66 and 11,101.40

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Solution

The fourth proportional to 20,959.90, 31,455.66 and 11,101.40 is: 16,660.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.90 : 31,455.66 = 11,101.40 : x
  2. Step 2: Convert to fraction form
    20,959.90/31,455.66 = 11,101.40/x
  3. Step 3: Cross multiply
    20,959.90x = 31,455.66 × 11,101.40
  4. Step 4: Simplify right side
    20,959.90x = 349,201,863.92
  5. Step 5: Solve for x
    x = 349,201,863.92/20,959.90
  6. Step 6: Final answer
    x = 16,660.47

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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.