Home / 28,239.91-38,971.09-15,664.66

Finding the Fourth Proportional to 28,239.91, 38,971.09 and 15,664.66

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Solution

The fourth proportional to 28,239.91, 38,971.09 and 15,664.66 is: 21,617.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.91 : 38,971.09 = 15,664.66 : x
  2. Step 2: Convert to fraction form
    28,239.91/38,971.09 = 15,664.66/x
  3. Step 3: Cross multiply
    28,239.91x = 38,971.09 × 15,664.66
  4. Step 4: Simplify right side
    28,239.91x = 610,468,796.83
  5. Step 5: Solve for x
    x = 610,468,796.83/28,239.91
  6. Step 6: Final answer
    x = 21,617.24

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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.