Home / 20,240.37-27,931.86-11,288.45

Finding the Fourth Proportional to 20,240.37, 27,931.86 and 11,288.45

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Solution

The fourth proportional to 20,240.37, 27,931.86 and 11,288.45 is: 15,578.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.37 : 27,931.86 = 11,288.45 : x
  2. Step 2: Convert to fraction form
    20,240.37/27,931.86 = 11,288.45/x
  3. Step 3: Cross multiply
    20,240.37x = 27,931.86 × 11,288.45
  4. Step 4: Simplify right side
    20,240.37x = 315,307,474.85
  5. Step 5: Solve for x
    x = 315,307,474.85/20,240.37
  6. Step 6: Final answer
    x = 15,578.15

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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.