Home / 57,866.40-86,799.60-20,921.76

Finding the Fourth Proportional to 57,866.40, 86,799.60 and 20,921.76

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Solution

The fourth proportional to 57,866.40, 86,799.60 and 20,921.76 is: 31,382.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,866.40 : 86,799.60 = 20,921.76 : x
  2. Step 2: Convert to fraction form
    57,866.40/86,799.60 = 20,921.76/x
  3. Step 3: Cross multiply
    57,866.40x = 86,799.60 × 20,921.76
  4. Step 4: Simplify right side
    57,866.40x = 1,816,000,399.30
  5. Step 5: Solve for x
    x = 1,816,000,399.30/57,866.40
  6. Step 6: Final answer
    x = 31,382.64

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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.