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Finding the Fourth Proportional to 19,419.52, 29,138.88 and 6,945.60

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Solution

The fourth proportional to 19,419.52, 29,138.88 and 6,945.60 is: 10,421.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,419.52 : 29,138.88 = 6,945.60 : x
  2. Step 2: Convert to fraction form
    19,419.52/29,138.88 = 6,945.60/x
  3. Step 3: Cross multiply
    19,419.52x = 29,138.88 × 6,945.60
  4. Step 4: Simplify right side
    19,419.52x = 202,387,004.93
  5. Step 5: Solve for x
    x = 202,387,004.93/19,419.52
  6. Step 6: Final answer
    x = 10,421.83

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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.