Home / 38,790-53,530.20-21,126

Finding the Fourth Proportional to 38,790, 53,530.20 and 21,126

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Solution

The fourth proportional to 38,790, 53,530.20 and 21,126 is: 29,153.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,790 : 53,530.20 = 21,126 : x
  2. Step 2: Convert to fraction form
    38,790/53,530.20 = 21,126/x
  3. Step 3: Cross multiply
    38,790x = 53,530.20 × 21,126
  4. Step 4: Simplify right side
    38,790x = 1,130,879,005.20
  5. Step 5: Solve for x
    x = 1,130,879,005.20/38,790
  6. Step 6: Final answer
    x = 29,153.88

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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.