Home / 20,882.40-31,321.44-19,664.16

Finding the Fourth Proportional to 20,882.40, 31,321.44 and 19,664.16

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Solution

The fourth proportional to 20,882.40, 31,321.44 and 19,664.16 is: 29,494.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.40 : 31,321.44 = 19,664.16 : x
  2. Step 2: Convert to fraction form
    20,882.40/31,321.44 = 19,664.16/x
  3. Step 3: Cross multiply
    20,882.40x = 31,321.44 × 19,664.16
  4. Step 4: Simplify right side
    20,882.40x = 615,909,807.59
  5. Step 5: Solve for x
    x = 615,909,807.59/20,882.40
  6. Step 6: Final answer
    x = 29,494.21

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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.