Home / 21,500.09-29,669.56-11,939.69

Finding the Fourth Proportional to 21,500.09, 29,669.56 and 11,939.69

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Solution

The fourth proportional to 21,500.09, 29,669.56 and 11,939.69 is: 16,476.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,500.09 : 29,669.56 = 11,939.69 : x
  2. Step 2: Convert to fraction form
    21,500.09/29,669.56 = 11,939.69/x
  3. Step 3: Cross multiply
    21,500.09x = 29,669.56 × 11,939.69
  4. Step 4: Simplify right side
    21,500.09x = 354,245,140.79
  5. Step 5: Solve for x
    x = 354,245,140.79/21,500.09
  6. Step 6: Final answer
    x = 16,476.45

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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.