Home / 21,083.42-29,108.58-13,137.32

Finding the Fourth Proportional to 21,083.42, 29,108.58 and 13,137.32

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Solution

The fourth proportional to 21,083.42, 29,108.58 and 13,137.32 is: 18,137.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.42 : 29,108.58 = 13,137.32 : x
  2. Step 2: Convert to fraction form
    21,083.42/29,108.58 = 13,137.32/x
  3. Step 3: Cross multiply
    21,083.42x = 29,108.58 × 13,137.32
  4. Step 4: Simplify right side
    21,083.42x = 382,408,730.21
  5. Step 5: Solve for x
    x = 382,408,730.21/21,083.42
  6. Step 6: Final answer
    x = 18,137.89

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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.