Home / 21,777.21-30,061.70-18,437.33

Finding the Fourth Proportional to 21,777.21, 30,061.70 and 18,437.33

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Solution

The fourth proportional to 21,777.21, 30,061.70 and 18,437.33 is: 25,451.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,777.21 : 30,061.70 = 18,437.33 : x
  2. Step 2: Convert to fraction form
    21,777.21/30,061.70 = 18,437.33/x
  3. Step 3: Cross multiply
    21,777.21x = 30,061.70 × 18,437.33
  4. Step 4: Simplify right side
    21,777.21x = 554,257,604.51
  5. Step 5: Solve for x
    x = 554,257,604.51/21,777.21
  6. Step 6: Final answer
    x = 25,451.27

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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.