Home / 28,145.68-42,212.21-8,421.71

Finding the Fourth Proportional to 28,145.68, 42,212.21 and 8,421.71

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Solution

The fourth proportional to 28,145.68, 42,212.21 and 8,421.71 is: 12,630.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.68 : 42,212.21 = 8,421.71 : x
  2. Step 2: Convert to fraction form
    28,145.68/42,212.21 = 8,421.71/x
  3. Step 3: Cross multiply
    28,145.68x = 42,212.21 × 8,421.71
  4. Step 4: Simplify right side
    28,145.68x = 355,498,737.91
  5. Step 5: Solve for x
    x = 355,498,737.91/28,145.68
  6. Step 6: Final answer
    x = 12,630.67

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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.