Home / 20,883.40-31,322.94-19,665.16

Finding the Fourth Proportional to 20,883.40, 31,322.94 and 19,665.16

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Solution

The fourth proportional to 20,883.40, 31,322.94 and 19,665.16 is: 29,495.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.40 : 31,322.94 = 19,665.16 : x
  2. Step 2: Convert to fraction form
    20,883.40/31,322.94 = 19,665.16/x
  3. Step 3: Cross multiply
    20,883.40x = 31,322.94 × 19,665.16
  4. Step 4: Simplify right side
    20,883.40x = 615,970,626.77
  5. Step 5: Solve for x
    x = 615,970,626.77/20,883.40
  6. Step 6: Final answer
    x = 29,495.71

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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.