Home / 20,677.63-28,534.78-11,478.86

Finding the Fourth Proportional to 20,677.63, 28,534.78 and 11,478.86

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Solution

The fourth proportional to 20,677.63, 28,534.78 and 11,478.86 is: 15,840.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,677.63 : 28,534.78 = 11,478.86 : x
  2. Step 2: Convert to fraction form
    20,677.63/28,534.78 = 11,478.86/x
  3. Step 3: Cross multiply
    20,677.63x = 28,534.78 × 11,478.86
  4. Step 4: Simplify right side
    20,677.63x = 327,546,883.94
  5. Step 5: Solve for x
    x = 327,546,883.94/20,677.63
  6. Step 6: Final answer
    x = 15,840.64

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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.