Home / 30,691.73-42,340.28-19,935.87

Finding the Fourth Proportional to 30,691.73, 42,340.28 and 19,935.87

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Solution

The fourth proportional to 30,691.73, 42,340.28 and 19,935.87 is: 27,502.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,691.73 : 42,340.28 = 19,935.87 : x
  2. Step 2: Convert to fraction form
    30,691.73/42,340.28 = 19,935.87/x
  3. Step 3: Cross multiply
    30,691.73x = 42,340.28 × 19,935.87
  4. Step 4: Simplify right side
    30,691.73x = 844,090,218.16
  5. Step 5: Solve for x
    x = 844,090,218.16/30,691.73
  6. Step 6: Final answer
    x = 27,502.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.