Home / 27,629.36-38,143.68-20,572.64

Finding the Fourth Proportional to 27,629.36, 38,143.68 and 20,572.64

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Solution

The fourth proportional to 27,629.36, 38,143.68 and 20,572.64 is: 28,401.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,629.36 : 38,143.68 = 20,572.64 : x
  2. Step 2: Convert to fraction form
    27,629.36/38,143.68 = 20,572.64/x
  3. Step 3: Cross multiply
    27,629.36x = 38,143.68 × 20,572.64
  4. Step 4: Simplify right side
    27,629.36x = 784,716,196.92
  5. Step 5: Solve for x
    x = 784,716,196.92/27,629.36
  6. Step 6: Final answer
    x = 28,401.53

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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.