Home / 21,177.55-31,735.70-11,691.74

Finding the Fourth Proportional to 21,177.55, 31,735.70 and 11,691.74

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Solution

The fourth proportional to 21,177.55, 31,735.70 and 11,691.74 is: 17,520.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.55 : 31,735.70 = 11,691.74 : x
  2. Step 2: Convert to fraction form
    21,177.55/31,735.70 = 11,691.74/x
  3. Step 3: Cross multiply
    21,177.55x = 31,735.70 × 11,691.74
  4. Step 4: Simplify right side
    21,177.55x = 371,045,617.84
  5. Step 5: Solve for x
    x = 371,045,617.84/21,177.55
  6. Step 6: Final answer
    x = 17,520.70

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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.