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Finding the Fourth Proportional to 12,603.42, 18,913.05 and 4,813.02

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Solution

The fourth proportional to 12,603.42, 18,913.05 and 4,813.02 is: 7,222.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.42 : 18,913.05 = 4,813.02 : x
  2. Step 2: Convert to fraction form
    12,603.42/18,913.05 = 4,813.02/x
  3. Step 3: Cross multiply
    12,603.42x = 18,913.05 × 4,813.02
  4. Step 4: Simplify right side
    12,603.42x = 91,028,887.91
  5. Step 5: Solve for x
    x = 91,028,887.91/12,603.42
  6. Step 6: Final answer
    x = 7,222.55

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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.