Home / 30,934.97-42,689.79-18,189.62

Finding the Fourth Proportional to 30,934.97, 42,689.79 and 18,189.62

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Solution

The fourth proportional to 30,934.97, 42,689.79 and 18,189.62 is: 25,101.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,934.97 : 42,689.79 = 18,189.62 : x
  2. Step 2: Convert to fraction form
    30,934.97/42,689.79 = 18,189.62/x
  3. Step 3: Cross multiply
    30,934.97x = 42,689.79 × 18,189.62
  4. Step 4: Simplify right side
    30,934.97x = 776,510,844.53
  5. Step 5: Solve for x
    x = 776,510,844.53/30,934.97
  6. Step 6: Final answer
    x = 25,101.40

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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.