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Finding the Fourth Proportional to 15,036.91, 20,751.20 and 8,323.09

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Solution

The fourth proportional to 15,036.91, 20,751.20 and 8,323.09 is: 11,486.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,036.91 : 20,751.20 = 8,323.09 : x
  2. Step 2: Convert to fraction form
    15,036.91/20,751.20 = 8,323.09/x
  3. Step 3: Cross multiply
    15,036.91x = 20,751.20 × 8,323.09
  4. Step 4: Simplify right side
    15,036.91x = 172,714,105.21
  5. Step 5: Solve for x
    x = 172,714,105.21/15,036.91
  6. Step 6: Final answer
    x = 11,486.01

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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.