Home / 21,209.40-31,815.36-5,626.98

Finding the Fourth Proportional to 21,209.40, 31,815.36 and 5,626.98

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Solution

The fourth proportional to 21,209.40, 31,815.36 and 5,626.98 is: 8,440.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.40 : 31,815.36 = 5,626.98 : x
  2. Step 2: Convert to fraction form
    21,209.40/31,815.36 = 5,626.98/x
  3. Step 3: Cross multiply
    21,209.40x = 31,815.36 × 5,626.98
  4. Step 4: Simplify right side
    21,209.40x = 179,024,394.41
  5. Step 5: Solve for x
    x = 179,024,394.41/21,209.40
  6. Step 6: Final answer
    x = 8,440.80

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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.