Home / 21,036.24-29,028.80-13,078.32

Finding the Fourth Proportional to 21,036.24, 29,028.80 and 13,078.32

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Solution

The fourth proportional to 21,036.24, 29,028.80 and 13,078.32 is: 18,047.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,036.24 : 29,028.80 = 13,078.32 : x
  2. Step 2: Convert to fraction form
    21,036.24/29,028.80 = 13,078.32/x
  3. Step 3: Cross multiply
    21,036.24x = 29,028.80 × 13,078.32
  4. Step 4: Simplify right side
    21,036.24x = 379,647,935.62
  5. Step 5: Solve for x
    x = 379,647,935.62/21,036.24
  6. Step 6: Final answer
    x = 18,047.33

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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.