Home / 15,143.39-20,896.83-9,477.90

Finding the Fourth Proportional to 15,143.39, 20,896.83 and 9,477.90

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Solution

The fourth proportional to 15,143.39, 20,896.83 and 9,477.90 is: 13,078.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,143.39 : 20,896.83 = 9,477.90 : x
  2. Step 2: Convert to fraction form
    15,143.39/20,896.83 = 9,477.90/x
  3. Step 3: Cross multiply
    15,143.39x = 20,896.83 × 9,477.90
  4. Step 4: Simplify right side
    15,143.39x = 198,058,065.06
  5. Step 5: Solve for x
    x = 198,058,065.06/15,143.39
  6. Step 6: Final answer
    x = 13,078.85

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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.