Home / 21,907.86-30,232.71-12,959.79

Finding the Fourth Proportional to 21,907.86, 30,232.71 and 12,959.79

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Solution

The fourth proportional to 21,907.86, 30,232.71 and 12,959.79 is: 17,884.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,907.86 : 30,232.71 = 12,959.79 : x
  2. Step 2: Convert to fraction form
    21,907.86/30,232.71 = 12,959.79/x
  3. Step 3: Cross multiply
    21,907.86x = 30,232.71 × 12,959.79
  4. Step 4: Simplify right side
    21,907.86x = 391,809,572.73
  5. Step 5: Solve for x
    x = 391,809,572.73/21,907.86
  6. Step 6: Final answer
    x = 17,884.43

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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.