Home / 21,274.35-29,339.49-13,317.30

Finding the Fourth Proportional to 21,274.35, 29,339.49 and 13,317.30

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Solution

The fourth proportional to 21,274.35, 29,339.49 and 13,317.30 is: 18,365.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.35 : 29,339.49 = 13,317.30 : x
  2. Step 2: Convert to fraction form
    21,274.35/29,339.49 = 13,317.30/x
  3. Step 3: Cross multiply
    21,274.35x = 29,339.49 × 13,317.30
  4. Step 4: Simplify right side
    21,274.35x = 390,722,790.18
  5. Step 5: Solve for x
    x = 390,722,790.18/21,274.35
  6. Step 6: Final answer
    x = 18,365.91

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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.