Home / 21,469.45-29,621.78-13,916.10

Finding the Fourth Proportional to 21,469.45, 29,621.78 and 13,916.10

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Solution

The fourth proportional to 21,469.45, 29,621.78 and 13,916.10 is: 19,200.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,469.45 : 29,621.78 = 13,916.10 : x
  2. Step 2: Convert to fraction form
    21,469.45/29,621.78 = 13,916.10/x
  3. Step 3: Cross multiply
    21,469.45x = 29,621.78 × 13,916.10
  4. Step 4: Simplify right side
    21,469.45x = 412,219,652.66
  5. Step 5: Solve for x
    x = 412,219,652.66/21,469.45
  6. Step 6: Final answer
    x = 19,200.29

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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.