Home / 20,411.36-30,615.59-5,418.14

Finding the Fourth Proportional to 20,411.36, 30,615.59 and 5,418.14

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Solution

The fourth proportional to 20,411.36, 30,615.59 and 5,418.14 is: 8,126.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.36 : 30,615.59 = 5,418.14 : x
  2. Step 2: Convert to fraction form
    20,411.36/30,615.59 = 5,418.14/x
  3. Step 3: Cross multiply
    20,411.36x = 30,615.59 × 5,418.14
  4. Step 4: Simplify right side
    20,411.36x = 165,879,372.63
  5. Step 5: Solve for x
    x = 165,879,372.63/20,411.36
  6. Step 6: Final answer
    x = 8,126.82

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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.