Home / 42,754.23-64,145.39-20,564.69

Finding the Fourth Proportional to 42,754.23, 64,145.39 and 20,564.69

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Solution

The fourth proportional to 42,754.23, 64,145.39 and 20,564.69 is: 30,853.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,754.23 : 64,145.39 = 20,564.69 : x
  2. Step 2: Convert to fraction form
    42,754.23/64,145.39 = 20,564.69/x
  3. Step 3: Cross multiply
    42,754.23x = 64,145.39 × 20,564.69
  4. Step 4: Simplify right side
    42,754.23x = 1,319,129,636.73
  5. Step 5: Solve for x
    x = 1,319,129,636.73/42,754.23
  6. Step 6: Final answer
    x = 30,853.78

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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.