Home / 10,480.30-15,720.45-2,689.11

Finding the Fourth Proportional to 10,480.30, 15,720.45 and 2,689.11

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Solution

The fourth proportional to 10,480.30, 15,720.45 and 2,689.11 is: 4,033.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,480.30 : 15,720.45 = 2,689.11 : x
  2. Step 2: Convert to fraction form
    10,480.30/15,720.45 = 2,689.11/x
  3. Step 3: Cross multiply
    10,480.30x = 15,720.45 × 2,689.11
  4. Step 4: Simplify right side
    10,480.30x = 42,274,019.30
  5. Step 5: Solve for x
    x = 42,274,019.30/10,480.30
  6. Step 6: Final answer
    x = 4,033.67

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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.