Home / 21,186.50-29,133.69-18,387.14

Finding the Fourth Proportional to 21,186.50, 29,133.69 and 18,387.14

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Solution

The fourth proportional to 21,186.50, 29,133.69 and 18,387.14 is: 25,284.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.50 : 29,133.69 = 18,387.14 : x
  2. Step 2: Convert to fraction form
    21,186.50/29,133.69 = 18,387.14/x
  3. Step 3: Cross multiply
    21,186.50x = 29,133.69 × 18,387.14
  4. Step 4: Simplify right side
    21,186.50x = 535,685,236.75
  5. Step 5: Solve for x
    x = 535,685,236.75/21,186.50
  6. Step 6: Final answer
    x = 25,284.27

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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.