Home / 20,421.95-30,634.82-7,942.91

Finding the Fourth Proportional to 20,421.95, 30,634.82 and 7,942.91

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Solution

The fourth proportional to 20,421.95, 30,634.82 and 7,942.91 is: 11,915.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.95 : 30,634.82 = 7,942.91 : x
  2. Step 2: Convert to fraction form
    20,421.95/30,634.82 = 7,942.91/x
  3. Step 3: Cross multiply
    20,421.95x = 30,634.82 × 7,942.91
  4. Step 4: Simplify right side
    20,421.95x = 243,329,425.24
  5. Step 5: Solve for x
    x = 243,329,425.24/20,421.95
  6. Step 6: Final answer
    x = 11,915.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.