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Finding the Fourth Proportional to 19,560.78, 29,347.20 and 5,709.78

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Solution

The fourth proportional to 19,560.78, 29,347.20 and 5,709.78 is: 8,566.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,560.78 : 29,347.20 = 5,709.78 : x
  2. Step 2: Convert to fraction form
    19,560.78/29,347.20 = 5,709.78/x
  3. Step 3: Cross multiply
    19,560.78x = 29,347.20 × 5,709.78
  4. Step 4: Simplify right side
    19,560.78x = 167,566,055.62
  5. Step 5: Solve for x
    x = 167,566,055.62/19,560.78
  6. Step 6: Final answer
    x = 8,566.43

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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.