Home / 30,720.97-42,383.35-17,970.09

Finding the Fourth Proportional to 30,720.97, 42,383.35 and 17,970.09

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Solution

The fourth proportional to 30,720.97, 42,383.35 and 17,970.09 is: 24,791.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,720.97 : 42,383.35 = 17,970.09 : x
  2. Step 2: Convert to fraction form
    30,720.97/42,383.35 = 17,970.09/x
  3. Step 3: Cross multiply
    30,720.97x = 42,383.35 × 17,970.09
  4. Step 4: Simplify right side
    30,720.97x = 761,632,614.00
  5. Step 5: Solve for x
    x = 761,632,614.00/30,720.97
  6. Step 6: Final answer
    x = 24,791.95

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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.