Home / 21,330.72-31,999.86-10,257.48

Finding the Fourth Proportional to 21,330.72, 31,999.86 and 10,257.48

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Solution

The fourth proportional to 21,330.72, 31,999.86 and 10,257.48 is: 15,388.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.72 : 31,999.86 = 10,257.48 : x
  2. Step 2: Convert to fraction form
    21,330.72/31,999.86 = 10,257.48/x
  3. Step 3: Cross multiply
    21,330.72x = 31,999.86 × 10,257.48
  4. Step 4: Simplify right side
    21,330.72x = 328,237,923.95
  5. Step 5: Solve for x
    x = 328,237,923.95/21,330.72
  6. Step 6: Final answer
    x = 15,388.04

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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.