Home / 15,336.72-21,162.69-8,621.28

Finding the Fourth Proportional to 15,336.72, 21,162.69 and 8,621.28

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Solution

The fourth proportional to 15,336.72, 21,162.69 and 8,621.28 is: 11,896.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,336.72 : 21,162.69 = 8,621.28 : x
  2. Step 2: Convert to fraction form
    15,336.72/21,162.69 = 8,621.28/x
  3. Step 3: Cross multiply
    15,336.72x = 21,162.69 × 8,621.28
  4. Step 4: Simplify right side
    15,336.72x = 182,449,476.04
  5. Step 5: Solve for x
    x = 182,449,476.04/15,336.72
  6. Step 6: Final answer
    x = 11,896.25

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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.