Home / 20,806.64-31,213.01-7,657.91

Finding the Fourth Proportional to 20,806.64, 31,213.01 and 7,657.91

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Solution

The fourth proportional to 20,806.64, 31,213.01 and 7,657.91 is: 11,487.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.64 : 31,213.01 = 7,657.91 : x
  2. Step 2: Convert to fraction form
    20,806.64/31,213.01 = 7,657.91/x
  3. Step 3: Cross multiply
    20,806.64x = 31,213.01 × 7,657.91
  4. Step 4: Simplify right side
    20,806.64x = 239,026,421.41
  5. Step 5: Solve for x
    x = 239,026,421.41/20,806.64
  6. Step 6: Final answer
    x = 11,487.99

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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.