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Finding the Fourth Proportional to 12,509.95, 18,737.13 and 8,989.39

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Solution

The fourth proportional to 12,509.95, 18,737.13 and 8,989.39 is: 13,464.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,509.95 : 18,737.13 = 8,989.39 : x
  2. Step 2: Convert to fraction form
    12,509.95/18,737.13 = 8,989.39/x
  3. Step 3: Cross multiply
    12,509.95x = 18,737.13 × 8,989.39
  4. Step 4: Simplify right side
    12,509.95x = 168,435,369.05
  5. Step 5: Solve for x
    x = 168,435,369.05/12,509.95
  6. Step 6: Final answer
    x = 13,464.11

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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.