Home / 15,738.99-21,719.39-8,665.47

Finding the Fourth Proportional to 15,738.99, 21,719.39 and 8,665.47

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Solution

The fourth proportional to 15,738.99, 21,719.39 and 8,665.47 is: 11,958.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,738.99 : 21,719.39 = 8,665.47 : x
  2. Step 2: Convert to fraction form
    15,738.99/21,719.39 = 8,665.47/x
  3. Step 3: Cross multiply
    15,738.99x = 21,719.39 × 8,665.47
  4. Step 4: Simplify right side
    15,738.99x = 188,208,679.14
  5. Step 5: Solve for x
    x = 188,208,679.14/15,738.99
  6. Step 6: Final answer
    x = 11,958.12

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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.