Home / 20,784.64-31,170.86-11,295.48

Finding the Fourth Proportional to 20,784.64, 31,170.86 and 11,295.48

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Solution

The fourth proportional to 20,784.64, 31,170.86 and 11,295.48 is: 16,939.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.64 : 31,170.86 = 11,295.48 : x
  2. Step 2: Convert to fraction form
    20,784.64/31,170.86 = 11,295.48/x
  3. Step 3: Cross multiply
    20,784.64x = 31,170.86 × 11,295.48
  4. Step 4: Simplify right side
    20,784.64x = 352,089,825.71
  5. Step 5: Solve for x
    x = 352,089,825.71/20,784.64
  6. Step 6: Final answer
    x = 16,939.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.