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Finding the Fourth Proportional to 12,271.50, 18,490.78 and 10,928.77

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Solution

The fourth proportional to 12,271.50, 18,490.78 and 10,928.77 is: 16,467.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,271.50 : 18,490.78 = 10,928.77 : x
  2. Step 2: Convert to fraction form
    12,271.50/18,490.78 = 10,928.77/x
  3. Step 3: Cross multiply
    12,271.50x = 18,490.78 × 10,928.77
  4. Step 4: Simplify right side
    12,271.50x = 202,081,553.19
  5. Step 5: Solve for x
    x = 202,081,553.19/12,271.50
  6. Step 6: Final answer
    x = 16,467.55

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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.