Home / 20,917.07-28,865.66-11,485.63

Finding the Fourth Proportional to 20,917.07, 28,865.66 and 11,485.63

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Solution

The fourth proportional to 20,917.07, 28,865.66 and 11,485.63 is: 15,850.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.07 : 28,865.66 = 11,485.63 : x
  2. Step 2: Convert to fraction form
    20,917.07/28,865.66 = 11,485.63/x
  3. Step 3: Cross multiply
    20,917.07x = 28,865.66 × 11,485.63
  4. Step 4: Simplify right side
    20,917.07x = 331,540,088.71
  5. Step 5: Solve for x
    x = 331,540,088.71/20,917.07
  6. Step 6: Final answer
    x = 15,850.22

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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.