Home / 21,148.78-29,183.32-12,649.14

Finding the Fourth Proportional to 21,148.78, 29,183.32 and 12,649.14

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Solution

The fourth proportional to 21,148.78, 29,183.32 and 12,649.14 is: 17,454.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,148.78 : 29,183.32 = 12,649.14 : x
  2. Step 2: Convert to fraction form
    21,148.78/29,183.32 = 12,649.14/x
  3. Step 3: Cross multiply
    21,148.78x = 29,183.32 × 12,649.14
  4. Step 4: Simplify right side
    21,148.78x = 369,143,900.34
  5. Step 5: Solve for x
    x = 369,143,900.34/21,148.78
  6. Step 6: Final answer
    x = 17,454.62

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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.