Home / 21,453.12-29,607.12-13,074.48

Finding the Fourth Proportional to 21,453.12, 29,607.12 and 13,074.48

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Solution

The fourth proportional to 21,453.12, 29,607.12 and 13,074.48 is: 18,043.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,453.12 : 29,607.12 = 13,074.48 : x
  2. Step 2: Convert to fraction form
    21,453.12/29,607.12 = 13,074.48/x
  3. Step 3: Cross multiply
    21,453.12x = 29,607.12 × 13,074.48
  4. Step 4: Simplify right side
    21,453.12x = 387,097,698.30
  5. Step 5: Solve for x
    x = 387,097,698.30/21,453.12
  6. Step 6: Final answer
    x = 18,043.89

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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.