Home / 30,721.44-42,402.24-18,148.08

Finding the Fourth Proportional to 30,721.44, 42,402.24 and 18,148.08

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Solution

The fourth proportional to 30,721.44, 42,402.24 and 18,148.08 is: 25,048.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,721.44 : 42,402.24 = 18,148.08 : x
  2. Step 2: Convert to fraction form
    30,721.44/42,402.24 = 18,148.08/x
  3. Step 3: Cross multiply
    30,721.44x = 42,402.24 × 18,148.08
  4. Step 4: Simplify right side
    30,721.44x = 769,519,243.70
  5. Step 5: Solve for x
    x = 769,519,243.70/30,721.44
  6. Step 6: Final answer
    x = 25,048.28

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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.