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Finding the Fourth Proportional to 18,980.60, 28,446.12 and 13,733.28

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Solution

The fourth proportional to 18,980.60, 28,446.12 and 13,733.28 is: 20,582.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.60 : 28,446.12 = 13,733.28 : x
  2. Step 2: Convert to fraction form
    18,980.60/28,446.12 = 13,733.28/x
  3. Step 3: Cross multiply
    18,980.60x = 28,446.12 × 13,733.28
  4. Step 4: Simplify right side
    18,980.60x = 390,658,530.87
  5. Step 5: Solve for x
    x = 390,658,530.87/18,980.60
  6. Step 6: Final answer
    x = 20,582.00

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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.