Home / 12,780.76-19,175.90-5,758.67

Finding the Fourth Proportional to 12,780.76, 19,175.90 and 5,758.67

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Solution

The fourth proportional to 12,780.76, 19,175.90 and 5,758.67 is: 8,640.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.76 : 19,175.90 = 5,758.67 : x
  2. Step 2: Convert to fraction form
    12,780.76/19,175.90 = 5,758.67/x
  3. Step 3: Cross multiply
    12,780.76x = 19,175.90 × 5,758.67
  4. Step 4: Simplify right side
    12,780.76x = 110,427,680.05
  5. Step 5: Solve for x
    x = 110,427,680.05/12,780.76
  6. Step 6: Final answer
    x = 8,640.15

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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.