Home / 13,708.38-20,520.63-8,782.77

Finding the Fourth Proportional to 13,708.38, 20,520.63 and 8,782.77

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Solution

The fourth proportional to 13,708.38, 20,520.63 and 8,782.77 is: 13,147.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.38 : 20,520.63 = 8,782.77 : x
  2. Step 2: Convert to fraction form
    13,708.38/20,520.63 = 8,782.77/x
  3. Step 3: Cross multiply
    13,708.38x = 20,520.63 × 8,782.77
  4. Step 4: Simplify right side
    13,708.38x = 180,227,973.55
  5. Step 5: Solve for x
    x = 180,227,973.55/13,708.38
  6. Step 6: Final answer
    x = 13,147.28

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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.