Home / 21,190.40-31,785.60-5,609.60

Finding the Fourth Proportional to 21,190.40, 31,785.60 and 5,609.60

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Solution

The fourth proportional to 21,190.40, 31,785.60 and 5,609.60 is: 8,414.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.40 : 31,785.60 = 5,609.60 : x
  2. Step 2: Convert to fraction form
    21,190.40/31,785.60 = 5,609.60/x
  3. Step 3: Cross multiply
    21,190.40x = 31,785.60 × 5,609.60
  4. Step 4: Simplify right side
    21,190.40x = 178,304,501.76
  5. Step 5: Solve for x
    x = 178,304,501.76/21,190.40
  6. Step 6: Final answer
    x = 8,414.40

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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.