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Finding the Fourth Proportional to 28,765.58, 39,696.48 and 16,831.22

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Solution

The fourth proportional to 28,765.58, 39,696.48 and 16,831.22 is: 23,227.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,765.58 : 39,696.48 = 16,831.22 : x
  2. Step 2: Convert to fraction form
    28,765.58/39,696.48 = 16,831.22/x
  3. Step 3: Cross multiply
    28,765.58x = 39,696.48 × 16,831.22
  4. Step 4: Simplify right side
    28,765.58x = 668,140,188.11
  5. Step 5: Solve for x
    x = 668,140,188.11/28,765.58
  6. Step 6: Final answer
    x = 23,227.07

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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.