Home / 21,133.40-29,160.82-12,181.32

Finding the Fourth Proportional to 21,133.40, 29,160.82 and 12,181.32

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Solution

The fourth proportional to 21,133.40, 29,160.82 and 12,181.32 is: 16,808.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.40 : 29,160.82 = 12,181.32 : x
  2. Step 2: Convert to fraction form
    21,133.40/29,160.82 = 12,181.32/x
  3. Step 3: Cross multiply
    21,133.40x = 29,160.82 × 12,181.32
  4. Step 4: Simplify right side
    21,133.40x = 355,217,279.88
  5. Step 5: Solve for x
    x = 355,217,279.88/21,133.40
  6. Step 6: Final answer
    x = 16,808.34

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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.