Home / 20,417.09-28,180.17-13,339.44

Finding the Fourth Proportional to 20,417.09, 28,180.17 and 13,339.44

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Solution

The fourth proportional to 20,417.09, 28,180.17 and 13,339.44 is: 18,411.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,417.09 : 28,180.17 = 13,339.44 : x
  2. Step 2: Convert to fraction form
    20,417.09/28,180.17 = 13,339.44/x
  3. Step 3: Cross multiply
    20,417.09x = 28,180.17 × 13,339.44
  4. Step 4: Simplify right side
    20,417.09x = 375,907,686.90
  5. Step 5: Solve for x
    x = 375,907,686.90/20,417.09
  6. Step 6: Final answer
    x = 18,411.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.