Home / 15,313.05-21,129.34-8,505.98

Finding the Fourth Proportional to 15,313.05, 21,129.34 and 8,505.98

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Solution

The fourth proportional to 15,313.05, 21,129.34 and 8,505.98 is: 11,736.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,313.05 : 21,129.34 = 8,505.98 : x
  2. Step 2: Convert to fraction form
    15,313.05/21,129.34 = 8,505.98/x
  3. Step 3: Cross multiply
    15,313.05x = 21,129.34 × 8,505.98
  4. Step 4: Simplify right side
    15,313.05x = 179,725,654.68
  5. Step 5: Solve for x
    x = 179,725,654.68/15,313.05
  6. Step 6: Final answer
    x = 11,736.77

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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.