Home / 21,111.45-29,129.75-12,036.64

Finding the Fourth Proportional to 21,111.45, 29,129.75 and 12,036.64

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Solution

The fourth proportional to 21,111.45, 29,129.75 and 12,036.64 is: 16,608.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111.45 : 29,129.75 = 12,036.64 : x
  2. Step 2: Convert to fraction form
    21,111.45/29,129.75 = 12,036.64/x
  3. Step 3: Cross multiply
    21,111.45x = 29,129.75 × 12,036.64
  4. Step 4: Simplify right side
    21,111.45x = 350,624,273.68
  5. Step 5: Solve for x
    x = 350,624,273.68/21,111.45
  6. Step 6: Final answer
    x = 16,608.25

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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.