Home / 20,346.09-28,076.34-11,392.08

Finding the Fourth Proportional to 20,346.09, 28,076.34 and 11,392.08

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Solution

The fourth proportional to 20,346.09, 28,076.34 and 11,392.08 is: 15,720.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,346.09 : 28,076.34 = 11,392.08 : x
  2. Step 2: Convert to fraction form
    20,346.09/28,076.34 = 11,392.08/x
  3. Step 3: Cross multiply
    20,346.09x = 28,076.34 × 11,392.08
  4. Step 4: Simplify right side
    20,346.09x = 319,847,911.39
  5. Step 5: Solve for x
    x = 319,847,911.39/20,346.09
  6. Step 6: Final answer
    x = 15,720.36

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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.