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Finding the Fourth Proportional to 18,648.39, 25,744.30 and 14,389.89

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Solution

The fourth proportional to 18,648.39, 25,744.30 and 14,389.89 is: 19,865.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,648.39 : 25,744.30 = 14,389.89 : x
  2. Step 2: Convert to fraction form
    18,648.39/25,744.30 = 14,389.89/x
  3. Step 3: Cross multiply
    18,648.39x = 25,744.30 × 14,389.89
  4. Step 4: Simplify right side
    18,648.39x = 370,457,512.61
  5. Step 5: Solve for x
    x = 370,457,512.61/18,648.39
  6. Step 6: Final answer
    x = 19,865.38

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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.