Home / 42,743.68-64,116.42-13,161.76

Finding the Fourth Proportional to 42,743.68, 64,116.42 and 13,161.76

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Solution

The fourth proportional to 42,743.68, 64,116.42 and 13,161.76 is: 19,742.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,743.68 : 64,116.42 = 13,161.76 : x
  2. Step 2: Convert to fraction form
    42,743.68/64,116.42 = 13,161.76/x
  3. Step 3: Cross multiply
    42,743.68x = 64,116.42 × 13,161.76
  4. Step 4: Simplify right side
    42,743.68x = 843,884,932.10
  5. Step 5: Solve for x
    x = 843,884,932.10/42,743.68
  6. Step 6: Final answer
    x = 19,742.92

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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.