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Finding the Fourth Proportional to 30,616.32, 45,891.72 and 15,821.28

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Solution

The fourth proportional to 30,616.32, 45,891.72 and 15,821.28 is: 23,714.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,616.32 : 45,891.72 = 15,821.28 : x
  2. Step 2: Convert to fraction form
    30,616.32/45,891.72 = 15,821.28/x
  3. Step 3: Cross multiply
    30,616.32x = 45,891.72 × 15,821.28
  4. Step 4: Simplify right side
    30,616.32x = 726,065,751.80
  5. Step 5: Solve for x
    x = 726,065,751.80/30,616.32
  6. Step 6: Final answer
    x = 23,714.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.