Home / 21,139.80-31,709.70-6,348.84

Finding the Fourth Proportional to 21,139.80, 31,709.70 and 6,348.84

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Solution

The fourth proportional to 21,139.80, 31,709.70 and 6,348.84 is: 9,523.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.80 : 31,709.70 = 6,348.84 : x
  2. Step 2: Convert to fraction form
    21,139.80/31,709.70 = 6,348.84/x
  3. Step 3: Cross multiply
    21,139.80x = 31,709.70 × 6,348.84
  4. Step 4: Simplify right side
    21,139.80x = 201,319,811.75
  5. Step 5: Solve for x
    x = 201,319,811.75/21,139.80
  6. Step 6: Final answer
    x = 9,523.26

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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.