Home / 21,142.40-31,713.54-17,188.96

Finding the Fourth Proportional to 21,142.40, 31,713.54 and 17,188.96

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Solution

The fourth proportional to 21,142.40, 31,713.54 and 17,188.96 is: 25,783.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.40 : 31,713.54 = 17,188.96 : x
  2. Step 2: Convert to fraction form
    21,142.40/31,713.54 = 17,188.96/x
  3. Step 3: Cross multiply
    21,142.40x = 31,713.54 × 17,188.96
  4. Step 4: Simplify right side
    21,142.40x = 545,122,770.52
  5. Step 5: Solve for x
    x = 545,122,770.52/21,142.40
  6. Step 6: Final answer
    x = 25,783.39

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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.