Home / 15,709.80-21,678.62-8,636.22

Finding the Fourth Proportional to 15,709.80, 21,678.62 and 8,636.22

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Solution

The fourth proportional to 15,709.80, 21,678.62 and 8,636.22 is: 11,917.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.80 : 21,678.62 = 8,636.22 : x
  2. Step 2: Convert to fraction form
    15,709.80/21,678.62 = 8,636.22/x
  3. Step 3: Cross multiply
    15,709.80x = 21,678.62 × 8,636.22
  4. Step 4: Simplify right side
    15,709.80x = 187,221,331.62
  5. Step 5: Solve for x
    x = 187,221,331.62/15,709.80
  6. Step 6: Final answer
    x = 11,917.49

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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.