Home / 21,272.08-31,908.44-7,421.08

Finding the Fourth Proportional to 21,272.08, 31,908.44 and 7,421.08

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Solution

The fourth proportional to 21,272.08, 31,908.44 and 7,421.08 is: 11,131.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.08 : 31,908.44 = 7,421.08 : x
  2. Step 2: Convert to fraction form
    21,272.08/31,908.44 = 7,421.08/x
  3. Step 3: Cross multiply
    21,272.08x = 31,908.44 × 7,421.08
  4. Step 4: Simplify right side
    21,272.08x = 236,795,085.92
  5. Step 5: Solve for x
    x = 236,795,085.92/21,272.08
  6. Step 6: Final answer
    x = 11,131.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.