Home / 21,341.78-29,453.32-11,911.76

Finding the Fourth Proportional to 21,341.78, 29,453.32 and 11,911.76

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Solution

The fourth proportional to 21,341.78, 29,453.32 and 11,911.76 is: 16,439.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,341.78 : 29,453.32 = 11,911.76 : x
  2. Step 2: Convert to fraction form
    21,341.78/29,453.32 = 11,911.76/x
  3. Step 3: Cross multiply
    21,341.78x = 29,453.32 × 11,911.76
  4. Step 4: Simplify right side
    21,341.78x = 350,840,879.04
  5. Step 5: Solve for x
    x = 350,840,879.04/21,341.78
  6. Step 6: Final answer
    x = 16,439.16

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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.