Home / 21,380.63-29,513.49-19,138.55

Finding the Fourth Proportional to 21,380.63, 29,513.49 and 19,138.55

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Solution

The fourth proportional to 21,380.63, 29,513.49 and 19,138.55 is: 26,418.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,380.63 : 29,513.49 = 19,138.55 : x
  2. Step 2: Convert to fraction form
    21,380.63/29,513.49 = 19,138.55/x
  3. Step 3: Cross multiply
    21,380.63x = 29,513.49 × 19,138.55
  4. Step 4: Simplify right side
    21,380.63x = 564,845,256.47
  5. Step 5: Solve for x
    x = 564,845,256.47/21,380.63
  6. Step 6: Final answer
    x = 26,418.56

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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.