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Finding the Fourth Proportional to 19,279.68, 28,840.32 and 15,391.68

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Solution

The fourth proportional to 19,279.68, 28,840.32 and 15,391.68 is: 23,024.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,279.68 : 28,840.32 = 15,391.68 : x
  2. Step 2: Convert to fraction form
    19,279.68/28,840.32 = 15,391.68/x
  3. Step 3: Cross multiply
    19,279.68x = 28,840.32 × 15,391.68
  4. Step 4: Simplify right side
    19,279.68x = 443,900,976.54
  5. Step 5: Solve for x
    x = 443,900,976.54/19,279.68
  6. Step 6: Final answer
    x = 23,024.29

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1.5x scale

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.