Home / 13,155.32-18,166.14-12,236.78

Finding the Fourth Proportional to 13,155.32, 18,166.14 and 12,236.78

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Solution

The fourth proportional to 13,155.32, 18,166.14 and 12,236.78 is: 16,897.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.32 : 18,166.14 = 12,236.78 : x
  2. Step 2: Convert to fraction form
    13,155.32/18,166.14 = 12,236.78/x
  3. Step 3: Cross multiply
    13,155.32x = 18,166.14 × 12,236.78
  4. Step 4: Simplify right side
    13,155.32x = 222,295,058.63
  5. Step 5: Solve for x
    x = 222,295,058.63/13,155.32
  6. Step 6: Final answer
    x = 16,897.73

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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.