Home / 20,653.18-28,502.18-11,221.74

Finding the Fourth Proportional to 20,653.18, 28,502.18 and 11,221.74

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Solution

The fourth proportional to 20,653.18, 28,502.18 and 11,221.74 is: 15,486.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.18 : 28,502.18 = 11,221.74 : x
  2. Step 2: Convert to fraction form
    20,653.18/28,502.18 = 11,221.74/x
  3. Step 3: Cross multiply
    20,653.18x = 28,502.18 × 11,221.74
  4. Step 4: Simplify right side
    20,653.18x = 319,843,997.28
  5. Step 5: Solve for x
    x = 319,843,997.28/20,653.18
  6. Step 6: Final answer
    x = 15,486.43

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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.