Home / 21,205.70-31,808.55-19,601.90

Finding the Fourth Proportional to 21,205.70, 31,808.55 and 19,601.90

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Solution

The fourth proportional to 21,205.70, 31,808.55 and 19,601.90 is: 29,402.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,205.70 : 31,808.55 = 19,601.90 : x
  2. Step 2: Convert to fraction form
    21,205.70/31,808.55 = 19,601.90/x
  3. Step 3: Cross multiply
    21,205.70x = 31,808.55 × 19,601.90
  4. Step 4: Simplify right side
    21,205.70x = 623,508,016.25
  5. Step 5: Solve for x
    x = 623,508,016.25/21,205.70
  6. Step 6: Final answer
    x = 29,402.85

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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.