Home / 21,177.79-29,224.91-13,109.29

Finding the Fourth Proportional to 21,177.79, 29,224.91 and 13,109.29

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Solution

The fourth proportional to 21,177.79, 29,224.91 and 13,109.29 is: 18,090.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.79 : 29,224.91 = 13,109.29 : x
  2. Step 2: Convert to fraction form
    21,177.79/29,224.91 = 13,109.29/x
  3. Step 3: Cross multiply
    21,177.79x = 29,224.91 × 13,109.29
  4. Step 4: Simplify right side
    21,177.79x = 383,117,730.97
  5. Step 5: Solve for x
    x = 383,117,730.97/21,177.79
  6. Step 6: Final answer
    x = 18,090.55

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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.