Home / 13,673.76-20,520.63-12,857.28

Finding the Fourth Proportional to 13,673.76, 20,520.63 and 12,857.28

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Solution

The fourth proportional to 13,673.76, 20,520.63 and 12,857.28 is: 19,295.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,673.76 : 20,520.63 = 12,857.28 : x
  2. Step 2: Convert to fraction form
    13,673.76/20,520.63 = 12,857.28/x
  3. Step 3: Cross multiply
    13,673.76x = 20,520.63 × 12,857.28
  4. Step 4: Simplify right side
    13,673.76x = 263,839,485.69
  5. Step 5: Solve for x
    x = 263,839,485.69/13,673.76
  6. Step 6: Final answer
    x = 19,295.31

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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.