Home / 20,658.28-30,981.86-8,968.76

Finding the Fourth Proportional to 20,658.28, 30,981.86 and 8,968.76

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Solution

The fourth proportional to 20,658.28, 30,981.86 and 8,968.76 is: 13,450.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.28 : 30,981.86 = 8,968.76 : x
  2. Step 2: Convert to fraction form
    20,658.28/30,981.86 = 8,968.76/x
  3. Step 3: Cross multiply
    20,658.28x = 30,981.86 × 8,968.76
  4. Step 4: Simplify right side
    20,658.28x = 277,868,866.69
  5. Step 5: Solve for x
    x = 277,868,866.69/20,658.28
  6. Step 6: Final answer
    x = 13,450.73

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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.