Home / 20,411.19-28,165.32-12,455.37

Finding the Fourth Proportional to 20,411.19, 28,165.32 and 12,455.37

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Solution

The fourth proportional to 20,411.19, 28,165.32 and 12,455.37 is: 17,187.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.19 : 28,165.32 = 12,455.37 : x
  2. Step 2: Convert to fraction form
    20,411.19/28,165.32 = 12,455.37/x
  3. Step 3: Cross multiply
    20,411.19x = 28,165.32 × 12,455.37
  4. Step 4: Simplify right side
    20,411.19x = 350,809,481.77
  5. Step 5: Solve for x
    x = 350,809,481.77/20,411.19
  6. Step 6: Final answer
    x = 17,187.12

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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.