Home / 8,145.18-12,208.95-3,987.99

Finding the Fourth Proportional to 8,145.18, 12,208.95 and 3,987.99

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Solution

The fourth proportional to 8,145.18, 12,208.95 and 3,987.99 is: 5,977.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,145.18 : 12,208.95 = 3,987.99 : x
  2. Step 2: Convert to fraction form
    8,145.18/12,208.95 = 3,987.99/x
  3. Step 3: Cross multiply
    8,145.18x = 12,208.95 × 3,987.99
  4. Step 4: Simplify right side
    8,145.18x = 48,689,170.51
  5. Step 5: Solve for x
    x = 48,689,170.51/8,145.18
  6. Step 6: Final answer
    x = 5,977.67

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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.