Home / 57,865.39-86,805-20,417.72

Finding the Fourth Proportional to 57,865.39, 86,805 and 20,417.72

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Solution

The fourth proportional to 57,865.39, 86,805 and 20,417.72 is: 30,629.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,865.39 : 86,805 = 20,417.72 : x
  2. Step 2: Convert to fraction form
    57,865.39/86,805 = 20,417.72/x
  3. Step 3: Cross multiply
    57,865.39x = 86,805 × 20,417.72
  4. Step 4: Simplify right side
    57,865.39x = 1,772,359,750.58
  5. Step 5: Solve for x
    x = 1,772,359,750.58/57,865.39
  6. Step 6: Final answer
    x = 30,629.01

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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.