Home / 10,122.72-13,972.32-6,398.88

Finding the Fourth Proportional to 10,122.72, 13,972.32 and 6,398.88

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Solution

The fourth proportional to 10,122.72, 13,972.32 and 6,398.88 is: 8,832.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,122.72 : 13,972.32 = 6,398.88 : x
  2. Step 2: Convert to fraction form
    10,122.72/13,972.32 = 6,398.88/x
  3. Step 3: Cross multiply
    10,122.72x = 13,972.32 × 6,398.88
  4. Step 4: Simplify right side
    10,122.72x = 89,407,199.00
  5. Step 5: Solve for x
    x = 89,407,199.00/10,122.72
  6. Step 6: Final answer
    x = 8,832.33

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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.