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Finding the Fourth Proportional to 20,801.79, 31,169.79 and 16,887.06

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Solution

The fourth proportional to 20,801.79, 31,169.79 and 16,887.06 is: 25,303.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.79 : 31,169.79 = 16,887.06 : x
  2. Step 2: Convert to fraction form
    20,801.79/31,169.79 = 16,887.06/x
  3. Step 3: Cross multiply
    20,801.79x = 31,169.79 × 16,887.06
  4. Step 4: Simplify right side
    20,801.79x = 526,366,113.92
  5. Step 5: Solve for x
    x = 526,366,113.92/20,801.79
  6. Step 6: Final answer
    x = 25,303.89

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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.