Home / 13,998.78-21,002.63-4,138.11

Finding the Fourth Proportional to 13,998.78, 21,002.63 and 4,138.11

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Solution

The fourth proportional to 13,998.78, 21,002.63 and 4,138.11 is: 6,208.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.78 : 21,002.63 = 4,138.11 : x
  2. Step 2: Convert to fraction form
    13,998.78/21,002.63 = 4,138.11/x
  3. Step 3: Cross multiply
    13,998.78x = 21,002.63 × 4,138.11
  4. Step 4: Simplify right side
    13,998.78x = 86,911,172.54
  5. Step 5: Solve for x
    x = 86,911,172.54/13,998.78
  6. Step 6: Final answer
    x = 6,208.48

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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.