Home / 30,712.29-42,361.75-18,781.49

Finding the Fourth Proportional to 30,712.29, 42,361.75 and 18,781.49

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Solution

The fourth proportional to 30,712.29, 42,361.75 and 18,781.49 is: 25,905.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,712.29 : 42,361.75 = 18,781.49 : x
  2. Step 2: Convert to fraction form
    30,712.29/42,361.75 = 18,781.49/x
  3. Step 3: Cross multiply
    30,712.29x = 42,361.75 × 18,781.49
  4. Step 4: Simplify right side
    30,712.29x = 795,616,784.01
  5. Step 5: Solve for x
    x = 795,616,784.01/30,712.29
  6. Step 6: Final answer
    x = 25,905.49

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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.