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Finding the Fourth Proportional to 18,989, 26,204.90 and 10,607.56

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Solution

The fourth proportional to 18,989, 26,204.90 and 10,607.56 is: 14,638.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989 : 26,204.90 = 10,607.56 : x
  2. Step 2: Convert to fraction form
    18,989/26,204.90 = 10,607.56/x
  3. Step 3: Cross multiply
    18,989x = 26,204.90 × 10,607.56
  4. Step 4: Simplify right side
    18,989x = 277,970,049.04
  5. Step 5: Solve for x
    x = 277,970,049.04/18,989
  6. Step 6: Final answer
    x = 14,638.48

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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.