Home / 42,857.54-64,327.80-20,686.48

Finding the Fourth Proportional to 42,857.54, 64,327.80 and 20,686.48

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Solution

The fourth proportional to 42,857.54, 64,327.80 and 20,686.48 is: 31,049.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,857.54 : 64,327.80 = 20,686.48 : x
  2. Step 2: Convert to fraction form
    42,857.54/64,327.80 = 20,686.48/x
  3. Step 3: Cross multiply
    42,857.54x = 64,327.80 × 20,686.48
  4. Step 4: Simplify right side
    42,857.54x = 1,330,715,748.14
  5. Step 5: Solve for x
    x = 1,330,715,748.14/42,857.54
  6. Step 6: Final answer
    x = 31,049.75

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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.