Home / 28,217.25-38,939.81-15,642

Finding the Fourth Proportional to 28,217.25, 38,939.81 and 15,642

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Solution

The fourth proportional to 28,217.25, 38,939.81 and 15,642 is: 21,585.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,217.25 : 38,939.81 = 15,642 : x
  2. Step 2: Convert to fraction form
    28,217.25/38,939.81 = 15,642/x
  3. Step 3: Cross multiply
    28,217.25x = 38,939.81 × 15,642
  4. Step 4: Simplify right side
    28,217.25x = 609,096,429.81
  5. Step 5: Solve for x
    x = 609,096,429.81/28,217.25
  6. Step 6: Final answer
    x = 21,585.96

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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.