Home / 39,360.65-54,316.61-21,456

Finding the Fourth Proportional to 39,360.65, 54,316.61 and 21,456

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Solution

The fourth proportional to 39,360.65, 54,316.61 and 21,456 is: 29,608.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,360.65 : 54,316.61 = 21,456 : x
  2. Step 2: Convert to fraction form
    39,360.65/54,316.61 = 21,456/x
  3. Step 3: Cross multiply
    39,360.65x = 54,316.61 × 21,456
  4. Step 4: Simplify right side
    39,360.65x = 1,165,417,076.88
  5. Step 5: Solve for x
    x = 1,165,417,076.88/39,360.65
  6. Step 6: Final answer
    x = 29,608.69

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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.