Home / 21,189.51-29,240.53-11,757.87

Finding the Fourth Proportional to 21,189.51, 29,240.53 and 11,757.87

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Solution

The fourth proportional to 21,189.51, 29,240.53 and 11,757.87 is: 16,225.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.51 : 29,240.53 = 11,757.87 : x
  2. Step 2: Convert to fraction form
    21,189.51/29,240.53 = 11,757.87/x
  3. Step 3: Cross multiply
    21,189.51x = 29,240.53 × 11,757.87
  4. Step 4: Simplify right side
    21,189.51x = 343,806,321.08
  5. Step 5: Solve for x
    x = 343,806,321.08/21,189.51
  6. Step 6: Final answer
    x = 16,225.31

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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.