Home / 15,221.36-21,005.16-8,506.80

Finding the Fourth Proportional to 15,221.36, 21,005.16 and 8,506.80

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Solution

The fourth proportional to 15,221.36, 21,005.16 and 8,506.80 is: 11,739.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.36 : 21,005.16 = 8,506.80 : x
  2. Step 2: Convert to fraction form
    15,221.36/21,005.16 = 8,506.80/x
  3. Step 3: Cross multiply
    15,221.36x = 21,005.16 × 8,506.80
  4. Step 4: Simplify right side
    15,221.36x = 178,686,695.09
  5. Step 5: Solve for x
    x = 178,686,695.09/15,221.36
  6. Step 6: Final answer
    x = 11,739.21

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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.