Home / 30,665.20-42,319.92-20,083.36

Finding the Fourth Proportional to 30,665.20, 42,319.92 and 20,083.36

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Solution

The fourth proportional to 30,665.20, 42,319.92 and 20,083.36 is: 27,716.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,665.20 : 42,319.92 = 20,083.36 : x
  2. Step 2: Convert to fraction form
    30,665.20/42,319.92 = 20,083.36/x
  3. Step 3: Cross multiply
    30,665.20x = 42,319.92 × 20,083.36
  4. Step 4: Simplify right side
    30,665.20x = 849,926,188.53
  5. Step 5: Solve for x
    x = 849,926,188.53/30,665.20
  6. Step 6: Final answer
    x = 27,716.31

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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.