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Finding the Fourth Proportional to 19,888.66, 29,828.36 and 8,789.30

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Solution

The fourth proportional to 19,888.66, 29,828.36 and 8,789.30 is: 13,181.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,888.66 : 29,828.36 = 8,789.30 : x
  2. Step 2: Convert to fraction form
    19,888.66/29,828.36 = 8,789.30/x
  3. Step 3: Cross multiply
    19,888.66x = 29,828.36 × 8,789.30
  4. Step 4: Simplify right side
    19,888.66x = 262,170,404.55
  5. Step 5: Solve for x
    x = 262,170,404.55/19,888.66
  6. Step 6: Final answer
    x = 13,181.90

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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.