Home / 15,621.20-21,551.16-9,954.90

Finding the Fourth Proportional to 15,621.20, 21,551.16 and 9,954.90

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Solution

The fourth proportional to 15,621.20, 21,551.16 and 9,954.90 is: 13,733.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.20 : 21,551.16 = 9,954.90 : x
  2. Step 2: Convert to fraction form
    15,621.20/21,551.16 = 9,954.90/x
  3. Step 3: Cross multiply
    15,621.20x = 21,551.16 × 9,954.90
  4. Step 4: Simplify right side
    15,621.20x = 214,539,680.01
  5. Step 5: Solve for x
    x = 214,539,680.01/15,621.20
  6. Step 6: Final answer
    x = 13,733.88

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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.