Home / 15,451.82-21,318.48-8,736.78

Finding the Fourth Proportional to 15,451.82, 21,318.48 and 8,736.78

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Solution

The fourth proportional to 15,451.82, 21,318.48 and 8,736.78 is: 12,053.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,451.82 : 21,318.48 = 8,736.78 : x
  2. Step 2: Convert to fraction form
    15,451.82/21,318.48 = 8,736.78/x
  3. Step 3: Cross multiply
    15,451.82x = 21,318.48 × 8,736.78
  4. Step 4: Simplify right side
    15,451.82x = 186,254,869.69
  5. Step 5: Solve for x
    x = 186,254,869.69/15,451.82
  6. Step 6: Final answer
    x = 12,053.92

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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.