Home / 20,756.43-28,643.99-11,325.20

Finding the Fourth Proportional to 20,756.43, 28,643.99 and 11,325.20

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Solution

The fourth proportional to 20,756.43, 28,643.99 and 11,325.20 is: 15,628.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.43 : 28,643.99 = 11,325.20 : x
  2. Step 2: Convert to fraction form
    20,756.43/28,643.99 = 11,325.20/x
  3. Step 3: Cross multiply
    20,756.43x = 28,643.99 × 11,325.20
  4. Step 4: Simplify right side
    20,756.43x = 324,398,715.70
  5. Step 5: Solve for x
    x = 324,398,715.70/20,756.43
  6. Step 6: Final answer
    x = 15,628.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.