Home / 21,133.72-29,162.79-12,181.84

Finding the Fourth Proportional to 21,133.72, 29,162.79 and 12,181.84

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Solution

The fourth proportional to 21,133.72, 29,162.79 and 12,181.84 is: 16,809.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.72 : 29,162.79 = 12,181.84 : x
  2. Step 2: Convert to fraction form
    21,133.72/29,162.79 = 12,181.84/x
  3. Step 3: Cross multiply
    21,133.72x = 29,162.79 × 12,181.84
  4. Step 4: Simplify right side
    21,133.72x = 355,256,368.83
  5. Step 5: Solve for x
    x = 355,256,368.83/21,133.72
  6. Step 6: Final answer
    x = 16,809.93

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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.