Home / 30,589.61-42,168.97-21,621.29

Finding the Fourth Proportional to 30,589.61, 42,168.97 and 21,621.29

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Solution

The fourth proportional to 30,589.61, 42,168.97 and 21,621.29 is: 29,805.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,589.61 : 42,168.97 = 21,621.29 : x
  2. Step 2: Convert to fraction form
    30,589.61/42,168.97 = 21,621.29/x
  3. Step 3: Cross multiply
    30,589.61x = 42,168.97 × 21,621.29
  4. Step 4: Simplify right side
    30,589.61x = 911,747,264.47
  5. Step 5: Solve for x
    x = 911,747,264.47/30,589.61
  6. Step 6: Final answer
    x = 29,805.79

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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.