Home / 28,212.91-38,933.82-15,637.66

Finding the Fourth Proportional to 28,212.91, 38,933.82 and 15,637.66

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Solution

The fourth proportional to 28,212.91, 38,933.82 and 15,637.66 is: 21,579.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,212.91 : 38,933.82 = 15,637.66 : x
  2. Step 2: Convert to fraction form
    28,212.91/38,933.82 = 15,637.66/x
  3. Step 3: Cross multiply
    28,212.91x = 38,933.82 × 15,637.66
  4. Step 4: Simplify right side
    28,212.91x = 608,833,839.66
  5. Step 5: Solve for x
    x = 608,833,839.66/28,212.91
  6. Step 6: Final answer
    x = 21,579.97

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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.