Home / 21,022.40-31,495.20-17,105.60

Finding the Fourth Proportional to 21,022.40, 31,495.20 and 17,105.60

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Solution

The fourth proportional to 21,022.40, 31,495.20 and 17,105.60 is: 25,627.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.40 : 31,495.20 = 17,105.60 : x
  2. Step 2: Convert to fraction form
    21,022.40/31,495.20 = 17,105.60/x
  3. Step 3: Cross multiply
    21,022.40x = 31,495.20 × 17,105.60
  4. Step 4: Simplify right side
    21,022.40x = 538,744,293.12
  5. Step 5: Solve for x
    x = 538,744,293.12/21,022.40
  6. Step 6: Final answer
    x = 25,627.15

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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.