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Finding the Fourth Proportional to 20,303.63, 28,019.21 and 11,351.63

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Solution

The fourth proportional to 20,303.63, 28,019.21 and 11,351.63 is: 15,665.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,303.63 : 28,019.21 = 11,351.63 : x
  2. Step 2: Convert to fraction form
    20,303.63/28,019.21 = 11,351.63/x
  3. Step 3: Cross multiply
    20,303.63x = 28,019.21 × 11,351.63
  4. Step 4: Simplify right side
    20,303.63x = 318,063,564.72
  5. Step 5: Solve for x
    x = 318,063,564.72/20,303.63
  6. Step 6: Final answer
    x = 15,665.35

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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.