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Finding the Fourth Proportional to 12,903.30, 19,464.30 and 12,356.55

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Solution

The fourth proportional to 12,903.30, 19,464.30 and 12,356.55 is: 18,639.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,903.30 : 19,464.30 = 12,356.55 : x
  2. Step 2: Convert to fraction form
    12,903.30/19,464.30 = 12,356.55/x
  3. Step 3: Cross multiply
    12,903.30x = 19,464.30 × 12,356.55
  4. Step 4: Simplify right side
    12,903.30x = 240,511,596.17
  5. Step 5: Solve for x
    x = 240,511,596.17/12,903.30
  6. Step 6: Final answer
    x = 18,639.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.