Home / 15,785.08-21,763.20-12,942.16

Finding the Fourth Proportional to 15,785.08, 21,763.20 and 12,942.16

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Solution

The fourth proportional to 15,785.08, 21,763.20 and 12,942.16 is: 17,843.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,785.08 : 21,763.20 = 12,942.16 : x
  2. Step 2: Convert to fraction form
    15,785.08/21,763.20 = 12,942.16/x
  3. Step 3: Cross multiply
    15,785.08x = 21,763.20 × 12,942.16
  4. Step 4: Simplify right side
    15,785.08x = 281,662,816.51
  5. Step 5: Solve for x
    x = 281,662,816.51/15,785.08
  6. Step 6: Final answer
    x = 17,843.61

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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.