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Finding the Fourth Proportional to 19,883.88, 29,819.44 and 8,790.32

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Solution

The fourth proportional to 19,883.88, 29,819.44 and 8,790.32 is: 13,182.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,883.88 : 29,819.44 = 8,790.32 : x
  2. Step 2: Convert to fraction form
    19,883.88/29,819.44 = 8,790.32/x
  3. Step 3: Cross multiply
    19,883.88x = 29,819.44 × 8,790.32
  4. Step 4: Simplify right side
    19,883.88x = 262,122,419.82
  5. Step 5: Solve for x
    x = 262,122,419.82/19,883.88
  6. Step 6: Final answer
    x = 13,182.66

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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.