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Finding the Fourth Proportional to 12,603.57, 18,905.36 and 4,289.56

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Solution

The fourth proportional to 12,603.57, 18,905.36 and 4,289.56 is: 6,434.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.57 : 18,905.36 = 4,289.56 : x
  2. Step 2: Convert to fraction form
    12,603.57/18,905.36 = 4,289.56/x
  3. Step 3: Cross multiply
    12,603.57x = 18,905.36 × 4,289.56
  4. Step 4: Simplify right side
    12,603.57x = 81,095,637.49
  5. Step 5: Solve for x
    x = 81,095,637.49/12,603.57
  6. Step 6: Final answer
    x = 6,434.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.