Home / 8,515.15-12,748.12-5,398.67

Finding the Fourth Proportional to 8,515.15, 12,748.12 and 5,398.67

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Solution

The fourth proportional to 8,515.15, 12,748.12 and 5,398.67 is: 8,082.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.15 : 12,748.12 = 5,398.67 : x
  2. Step 2: Convert to fraction form
    8,515.15/12,748.12 = 5,398.67/x
  3. Step 3: Cross multiply
    8,515.15x = 12,748.12 × 5,398.67
  4. Step 4: Simplify right side
    8,515.15x = 68,822,911.37
  5. Step 5: Solve for x
    x = 68,822,911.37/8,515.15
  6. Step 6: Final answer
    x = 8,082.41

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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.