Home / 20,090.60-27,719.54-12,538.15

Finding the Fourth Proportional to 20,090.60, 27,719.54 and 12,538.15

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Solution

The fourth proportional to 20,090.60, 27,719.54 and 12,538.15 is: 17,299.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.60 : 27,719.54 = 12,538.15 : x
  2. Step 2: Convert to fraction form
    20,090.60/27,719.54 = 12,538.15/x
  3. Step 3: Cross multiply
    20,090.60x = 27,719.54 × 12,538.15
  4. Step 4: Simplify right side
    20,090.60x = 347,551,549.16
  5. Step 5: Solve for x
    x = 347,551,549.16/20,090.60
  6. Step 6: Final answer
    x = 17,299.21

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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.