Home / 13,121.64-19,660.59-9,418.32

Finding the Fourth Proportional to 13,121.64, 19,660.59 and 9,418.32

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Solution

The fourth proportional to 13,121.64, 19,660.59 and 9,418.32 is: 14,111.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.64 : 19,660.59 = 9,418.32 : x
  2. Step 2: Convert to fraction form
    13,121.64/19,660.59 = 9,418.32/x
  3. Step 3: Cross multiply
    13,121.64x = 19,660.59 × 9,418.32
  4. Step 4: Simplify right side
    13,121.64x = 185,169,728.01
  5. Step 5: Solve for x
    x = 185,169,728.01/13,121.64
  6. Step 6: Final answer
    x = 14,111.78

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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.