Home / 20,311.52-28,035-11,820.56

Finding the Fourth Proportional to 20,311.52, 28,035 and 11,820.56

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Solution

The fourth proportional to 20,311.52, 28,035 and 11,820.56 is: 16,315.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.52 : 28,035 = 11,820.56 : x
  2. Step 2: Convert to fraction form
    20,311.52/28,035 = 11,820.56/x
  3. Step 3: Cross multiply
    20,311.52x = 28,035 × 11,820.56
  4. Step 4: Simplify right side
    20,311.52x = 331,389,399.60
  5. Step 5: Solve for x
    x = 331,389,399.60/20,311.52
  6. Step 6: Final answer
    x = 16,315.34

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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.