Home / 21,470.11-29,622.69-13,916.75

Finding the Fourth Proportional to 21,470.11, 29,622.69 and 13,916.75

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Solution

The fourth proportional to 21,470.11, 29,622.69 and 13,916.75 is: 19,201.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,470.11 : 29,622.69 = 13,916.75 : x
  2. Step 2: Convert to fraction form
    21,470.11/29,622.69 = 13,916.75/x
  3. Step 3: Cross multiply
    21,470.11x = 29,622.69 × 13,916.75
  4. Step 4: Simplify right side
    21,470.11x = 412,251,571.06
  5. Step 5: Solve for x
    x = 412,251,571.06/21,470.11
  6. Step 6: Final answer
    x = 19,201.19

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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.