Home / 20,302.56-28,025.28-13,230.72

Finding the Fourth Proportional to 20,302.56, 28,025.28 and 13,230.72

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Solution

The fourth proportional to 20,302.56, 28,025.28 and 13,230.72 is: 18,263.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,302.56 : 28,025.28 = 13,230.72 : x
  2. Step 2: Convert to fraction form
    20,302.56/28,025.28 = 13,230.72/x
  3. Step 3: Cross multiply
    20,302.56x = 28,025.28 × 13,230.72
  4. Step 4: Simplify right side
    20,302.56x = 370,794,632.60
  5. Step 5: Solve for x
    x = 370,794,632.60/20,302.56
  6. Step 6: Final answer
    x = 18,263.44

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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.