Home / 38,490.36-53,118.18-21,723

Finding the Fourth Proportional to 38,490.36, 53,118.18 and 21,723

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Solution

The fourth proportional to 38,490.36, 53,118.18 and 21,723 is: 29,978.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,490.36 : 53,118.18 = 21,723 : x
  2. Step 2: Convert to fraction form
    38,490.36/53,118.18 = 21,723/x
  3. Step 3: Cross multiply
    38,490.36x = 53,118.18 × 21,723
  4. Step 4: Simplify right side
    38,490.36x = 1,153,886,224.14
  5. Step 5: Solve for x
    x = 1,153,886,224.14/38,490.36
  6. Step 6: Final answer
    x = 29,978.58

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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.