Home / 21,103.44-29,118.84-13,647.12

Finding the Fourth Proportional to 21,103.44, 29,118.84 and 13,647.12

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Solution

The fourth proportional to 21,103.44, 29,118.84 and 13,647.12 is: 18,830.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.44 : 29,118.84 = 13,647.12 : x
  2. Step 2: Convert to fraction form
    21,103.44/29,118.84 = 13,647.12/x
  3. Step 3: Cross multiply
    21,103.44x = 29,118.84 × 13,647.12
  4. Step 4: Simplify right side
    21,103.44x = 397,388,303.74
  5. Step 5: Solve for x
    x = 397,388,303.74/21,103.44
  6. Step 6: Final answer
    x = 18,830.50

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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.