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Finding the Fourth Proportional to 18,653.62, 25,743.81 and 13,929.70

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Solution

The fourth proportional to 18,653.62, 25,743.81 and 13,929.70 is: 19,224.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,653.62 : 25,743.81 = 13,929.70 : x
  2. Step 2: Convert to fraction form
    18,653.62/25,743.81 = 13,929.70/x
  3. Step 3: Cross multiply
    18,653.62x = 25,743.81 × 13,929.70
  4. Step 4: Simplify right side
    18,653.62x = 358,603,550.16
  5. Step 5: Solve for x
    x = 358,603,550.16/18,653.62
  6. Step 6: Final answer
    x = 19,224.34

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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.