Home / 20,758.88-31,140.65-7,611.22

Finding the Fourth Proportional to 20,758.88, 31,140.65 and 7,611.22

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Solution

The fourth proportional to 20,758.88, 31,140.65 and 7,611.22 is: 11,417.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.88 : 31,140.65 = 7,611.22 : x
  2. Step 2: Convert to fraction form
    20,758.88/31,140.65 = 7,611.22/x
  3. Step 3: Cross multiply
    20,758.88x = 31,140.65 × 7,611.22
  4. Step 4: Simplify right side
    20,758.88x = 237,018,220.88
  5. Step 5: Solve for x
    x = 237,018,220.88/20,758.88
  6. Step 6: Final answer
    x = 11,417.68

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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.