Home / 15,489.99-21,379.56-10,185.30

Finding the Fourth Proportional to 15,489.99, 21,379.56 and 10,185.30

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Solution

The fourth proportional to 15,489.99, 21,379.56 and 10,185.30 is: 14,057.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.99 : 21,379.56 = 10,185.30 : x
  2. Step 2: Convert to fraction form
    15,489.99/21,379.56 = 10,185.30/x
  3. Step 3: Cross multiply
    15,489.99x = 21,379.56 × 10,185.30
  4. Step 4: Simplify right side
    15,489.99x = 217,757,232.47
  5. Step 5: Solve for x
    x = 217,757,232.47/15,489.99
  6. Step 6: Final answer
    x = 14,057.93

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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.