Home / 10,521.91-15,782.91-3,126.44

Finding the Fourth Proportional to 10,521.91, 15,782.91 and 3,126.44

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Solution

The fourth proportional to 10,521.91, 15,782.91 and 3,126.44 is: 4,689.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.91 : 15,782.91 = 3,126.44 : x
  2. Step 2: Convert to fraction form
    10,521.91/15,782.91 = 3,126.44/x
  3. Step 3: Cross multiply
    10,521.91x = 15,782.91 × 3,126.44
  4. Step 4: Simplify right side
    10,521.91x = 49,344,321.14
  5. Step 5: Solve for x
    x = 49,344,321.14/10,521.91
  6. Step 6: Final answer
    x = 4,689.67

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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.