Home / 20,289.64-28,004.38-13,203.76

Finding the Fourth Proportional to 20,289.64, 28,004.38 and 13,203.76

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Solution

The fourth proportional to 20,289.64, 28,004.38 and 13,203.76 is: 18,224.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.64 : 28,004.38 = 13,203.76 : x
  2. Step 2: Convert to fraction form
    20,289.64/28,004.38 = 13,203.76/x
  3. Step 3: Cross multiply
    20,289.64x = 28,004.38 × 13,203.76
  4. Step 4: Simplify right side
    20,289.64x = 369,763,112.47
  5. Step 5: Solve for x
    x = 369,763,112.47/20,289.64
  6. Step 6: Final answer
    x = 18,224.23

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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.