Home / 30,805.05-42,517.77-20,031.19

Finding the Fourth Proportional to 30,805.05, 42,517.77 and 20,031.19

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Solution

The fourth proportional to 30,805.05, 42,517.77 and 20,031.19 is: 27,647.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,805.05 : 42,517.77 = 20,031.19 : x
  2. Step 2: Convert to fraction form
    30,805.05/42,517.77 = 20,031.19/x
  3. Step 3: Cross multiply
    30,805.05x = 42,517.77 × 20,031.19
  4. Step 4: Simplify right side
    30,805.05x = 851,681,529.25
  5. Step 5: Solve for x
    x = 851,681,529.25/30,805.05
  6. Step 6: Final answer
    x = 27,647.46

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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.