Home / 10,721.58-16,090.20-10,640.13

Finding the Fourth Proportional to 10,721.58, 16,090.20 and 10,640.13

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Solution

The fourth proportional to 10,721.58, 16,090.20 and 10,640.13 is: 15,967.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,721.58 : 16,090.20 = 10,640.13 : x
  2. Step 2: Convert to fraction form
    10,721.58/16,090.20 = 10,640.13/x
  3. Step 3: Cross multiply
    10,721.58x = 16,090.20 × 10,640.13
  4. Step 4: Simplify right side
    10,721.58x = 171,201,819.73
  5. Step 5: Solve for x
    x = 171,201,819.73/10,721.58
  6. Step 6: Final answer
    x = 15,967.97

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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.