Home / 21,389.22-29,503.22-13,720.37

Finding the Fourth Proportional to 21,389.22, 29,503.22 and 13,720.37

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Solution

The fourth proportional to 21,389.22, 29,503.22 and 13,720.37 is: 18,925.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.22 : 29,503.22 = 13,720.37 : x
  2. Step 2: Convert to fraction form
    21,389.22/29,503.22 = 13,720.37/x
  3. Step 3: Cross multiply
    21,389.22x = 29,503.22 × 13,720.37
  4. Step 4: Simplify right side
    21,389.22x = 404,794,878.47
  5. Step 5: Solve for x
    x = 404,794,878.47/21,389.22
  6. Step 6: Final answer
    x = 18,925.18

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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.