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Finding the Fourth Proportional to 11,820.88, 17,712.08 and 6,894.72

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Solution

The fourth proportional to 11,820.88, 17,712.08 and 6,894.72 is: 10,330.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,820.88 : 17,712.08 = 6,894.72 : x
  2. Step 2: Convert to fraction form
    11,820.88/17,712.08 = 6,894.72/x
  3. Step 3: Cross multiply
    11,820.88x = 17,712.08 × 6,894.72
  4. Step 4: Simplify right side
    11,820.88x = 122,119,832.22
  5. Step 5: Solve for x
    x = 122,119,832.22/11,820.88
  6. Step 6: Final answer
    x = 10,330.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.