Home / 21,356.40-29,485.38-13,806.36

Finding the Fourth Proportional to 21,356.40, 29,485.38 and 13,806.36

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Solution

The fourth proportional to 21,356.40, 29,485.38 and 13,806.36 is: 19,061.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,356.40 : 29,485.38 = 13,806.36 : x
  2. Step 2: Convert to fraction form
    21,356.40/29,485.38 = 13,806.36/x
  3. Step 3: Cross multiply
    21,356.40x = 29,485.38 × 13,806.36
  4. Step 4: Simplify right side
    21,356.40x = 407,085,771.02
  5. Step 5: Solve for x
    x = 407,085,771.02/21,356.40
  6. Step 6: Final answer
    x = 19,061.54

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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.