Home / 20,653.78-28,502.13-11,222.41

Finding the Fourth Proportional to 20,653.78, 28,502.13 and 11,222.41

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Solution

The fourth proportional to 20,653.78, 28,502.13 and 11,222.41 is: 15,486.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.78 : 28,502.13 = 11,222.41 : x
  2. Step 2: Convert to fraction form
    20,653.78/28,502.13 = 11,222.41/x
  3. Step 3: Cross multiply
    20,653.78x = 28,502.13 × 11,222.41
  4. Step 4: Simplify right side
    20,653.78x = 319,862,588.73
  5. Step 5: Solve for x
    x = 319,862,588.73/20,653.78
  6. Step 6: Final answer
    x = 15,486.88

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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.