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Finding the Fourth Proportional to 18,905.65, 26,090.01 and 10,408.63

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Solution

The fourth proportional to 18,905.65, 26,090.01 and 10,408.63 is: 14,364.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.65 : 26,090.01 = 10,408.63 : x
  2. Step 2: Convert to fraction form
    18,905.65/26,090.01 = 10,408.63/x
  3. Step 3: Cross multiply
    18,905.65x = 26,090.01 × 10,408.63
  4. Step 4: Simplify right side
    18,905.65x = 271,561,260.79
  5. Step 5: Solve for x
    x = 271,561,260.79/18,905.65
  6. Step 6: Final answer
    x = 14,364.03

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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.