Home / 20,090.24-27,715.20-12,531.68

Finding the Fourth Proportional to 20,090.24, 27,715.20 and 12,531.68

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Solution

The fourth proportional to 20,090.24, 27,715.20 and 12,531.68 is: 17,287.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.24 : 27,715.20 = 12,531.68 : x
  2. Step 2: Convert to fraction form
    20,090.24/27,715.20 = 12,531.68/x
  3. Step 3: Cross multiply
    20,090.24x = 27,715.20 × 12,531.68
  4. Step 4: Simplify right side
    20,090.24x = 347,318,017.54
  5. Step 5: Solve for x
    x = 347,318,017.54/20,090.24
  6. Step 6: Final answer
    x = 17,287.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.