Home / 21,081.62-29,106.08-13,135.52

Finding the Fourth Proportional to 21,081.62, 29,106.08 and 13,135.52

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Solution

The fourth proportional to 21,081.62, 29,106.08 and 13,135.52 is: 18,135.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.62 : 29,106.08 = 13,135.52 : x
  2. Step 2: Convert to fraction form
    21,081.62/29,106.08 = 13,135.52/x
  3. Step 3: Cross multiply
    21,081.62x = 29,106.08 × 13,135.52
  4. Step 4: Simplify right side
    21,081.62x = 382,323,383.27
  5. Step 5: Solve for x
    x = 382,323,383.27/21,081.62
  6. Step 6: Final answer
    x = 18,135.39

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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.