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Finding the Fourth Proportional to 13,398.78, 20,098.17 and 5,603.34

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Solution

The fourth proportional to 13,398.78, 20,098.17 and 5,603.34 is: 8,405.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.78 : 20,098.17 = 5,603.34 : x
  2. Step 2: Convert to fraction form
    13,398.78/20,098.17 = 5,603.34/x
  3. Step 3: Cross multiply
    13,398.78x = 20,098.17 × 5,603.34
  4. Step 4: Simplify right side
    13,398.78x = 112,616,879.89
  5. Step 5: Solve for x
    x = 112,616,879.89/13,398.78
  6. Step 6: Final answer
    x = 8,405.01

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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.