Home / 21,127.86-29,162.93-12,181.33

Finding the Fourth Proportional to 21,127.86, 29,162.93 and 12,181.33

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Solution

The fourth proportional to 21,127.86, 29,162.93 and 12,181.33 is: 16,813.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.86 : 29,162.93 = 12,181.33 : x
  2. Step 2: Convert to fraction form
    21,127.86/29,162.93 = 12,181.33/x
  3. Step 3: Cross multiply
    21,127.86x = 29,162.93 × 12,181.33
  4. Step 4: Simplify right side
    21,127.86x = 355,243,213.19
  5. Step 5: Solve for x
    x = 355,243,213.19/21,127.86
  6. Step 6: Final answer
    x = 16,813.97

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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.