Home / 21,190.75-31,747.38-9,925.40

Finding the Fourth Proportional to 21,190.75, 31,747.38 and 9,925.40

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Solution

The fourth proportional to 21,190.75, 31,747.38 and 9,925.40 is: 14,869.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.75 : 31,747.38 = 9,925.40 : x
  2. Step 2: Convert to fraction form
    21,190.75/31,747.38 = 9,925.40/x
  3. Step 3: Cross multiply
    21,190.75x = 31,747.38 × 9,925.40
  4. Step 4: Simplify right side
    21,190.75x = 315,105,487.60
  5. Step 5: Solve for x
    x = 315,105,487.60/21,190.75
  6. Step 6: Final answer
    x = 14,869.96

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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.