Home / 21,830.21-30,125.56-12,270.34

Finding the Fourth Proportional to 21,830.21, 30,125.56 and 12,270.34

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Solution

The fourth proportional to 21,830.21, 30,125.56 and 12,270.34 is: 16,932.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,830.21 : 30,125.56 = 12,270.34 : x
  2. Step 2: Convert to fraction form
    21,830.21/30,125.56 = 12,270.34/x
  3. Step 3: Cross multiply
    21,830.21x = 30,125.56 × 12,270.34
  4. Step 4: Simplify right side
    21,830.21x = 369,650,651.91
  5. Step 5: Solve for x
    x = 369,650,651.91/21,830.21
  6. Step 6: Final answer
    x = 16,932.99

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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.