Home / 20,802.24-28,708.56-12,311.28

Finding the Fourth Proportional to 20,802.24, 28,708.56 and 12,311.28

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Solution

The fourth proportional to 20,802.24, 28,708.56 and 12,311.28 is: 16,990.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.24 : 28,708.56 = 12,311.28 : x
  2. Step 2: Convert to fraction form
    20,802.24/28,708.56 = 12,311.28/x
  3. Step 3: Cross multiply
    20,802.24x = 28,708.56 × 12,311.28
  4. Step 4: Simplify right side
    20,802.24x = 353,439,120.56
  5. Step 5: Solve for x
    x = 353,439,120.56/20,802.24
  6. Step 6: Final answer
    x = 16,990.44

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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.