Home / 21,958.07-30,289.77-13,889.21

Finding the Fourth Proportional to 21,958.07, 30,289.77 and 13,889.21

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Solution

The fourth proportional to 21,958.07, 30,289.77 and 13,889.21 is: 19,159.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.07 : 30,289.77 = 13,889.21 : x
  2. Step 2: Convert to fraction form
    21,958.07/30,289.77 = 13,889.21/x
  3. Step 3: Cross multiply
    21,958.07x = 30,289.77 × 13,889.21
  4. Step 4: Simplify right side
    21,958.07x = 420,700,824.93
  5. Step 5: Solve for x
    x = 420,700,824.93/21,958.07
  6. Step 6: Final answer
    x = 19,159.28

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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.