Home / 19,288.40-28,949-13,755.28

Finding the Fourth Proportional to 19,288.40, 28,949 and 13,755.28

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Solution

The fourth proportional to 19,288.40, 28,949 and 13,755.28 is: 20,644.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,288.40 : 28,949 = 13,755.28 : x
  2. Step 2: Convert to fraction form
    19,288.40/28,949 = 13,755.28/x
  3. Step 3: Cross multiply
    19,288.40x = 28,949 × 13,755.28
  4. Step 4: Simplify right side
    19,288.40x = 398,201,600.72
  5. Step 5: Solve for x
    x = 398,201,600.72/19,288.40
  6. Step 6: Final answer
    x = 20,644.62

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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.