Home / 21,090.78-31,636.17-6,299.84

Finding the Fourth Proportional to 21,090.78, 31,636.17 and 6,299.84

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Solution

The fourth proportional to 21,090.78, 31,636.17 and 6,299.84 is: 9,449.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.78 : 31,636.17 = 6,299.84 : x
  2. Step 2: Convert to fraction form
    21,090.78/31,636.17 = 6,299.84/x
  3. Step 3: Cross multiply
    21,090.78x = 31,636.17 × 6,299.84
  4. Step 4: Simplify right side
    21,090.78x = 199,302,888.30
  5. Step 5: Solve for x
    x = 199,302,888.30/21,090.78
  6. Step 6: Final answer
    x = 9,449.76

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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.