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Finding the Fourth Proportional to 18,838.86, 25,983.21 and 13,801.26

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Solution

The fourth proportional to 18,838.86, 25,983.21 and 13,801.26 is: 19,035.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,838.86 : 25,983.21 = 13,801.26 : x
  2. Step 2: Convert to fraction form
    18,838.86/25,983.21 = 13,801.26/x
  3. Step 3: Cross multiply
    18,838.86x = 25,983.21 × 13,801.26
  4. Step 4: Simplify right side
    18,838.86x = 358,601,036.84
  5. Step 5: Solve for x
    x = 358,601,036.84/18,838.86
  6. Step 6: Final answer
    x = 19,035.18

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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.