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Finding the Fourth Proportional to 15,992.64, 22,068.72 and 8,919.45

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Solution

The fourth proportional to 15,992.64, 22,068.72 and 8,919.45 is: 12,308.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,992.64 : 22,068.72 = 8,919.45 : x
  2. Step 2: Convert to fraction form
    15,992.64/22,068.72 = 8,919.45/x
  3. Step 3: Cross multiply
    15,992.64x = 22,068.72 × 8,919.45
  4. Step 4: Simplify right side
    15,992.64x = 196,840,844.60
  5. Step 5: Solve for x
    x = 196,840,844.60/15,992.64
  6. Step 6: Final answer
    x = 12,308.21

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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.