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Finding the Fourth Proportional to 15,797.72, 21,800.52 and 8,724.08

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Solution

The fourth proportional to 15,797.72, 21,800.52 and 8,724.08 is: 12,039.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,797.72 : 21,800.52 = 8,724.08 : x
  2. Step 2: Convert to fraction form
    15,797.72/21,800.52 = 8,724.08/x
  3. Step 3: Cross multiply
    15,797.72x = 21,800.52 × 8,724.08
  4. Step 4: Simplify right side
    15,797.72x = 190,189,480.52
  5. Step 5: Solve for x
    x = 190,189,480.52/15,797.72
  6. Step 6: Final answer
    x = 12,039.05

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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.