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Finding the Fourth Proportional to 12,540.52, 18,810.78 and 4,219

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Solution

The fourth proportional to 12,540.52, 18,810.78 and 4,219 is: 6,328.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,540.52 : 18,810.78 = 4,219 : x
  2. Step 2: Convert to fraction form
    12,540.52/18,810.78 = 4,219/x
  3. Step 3: Cross multiply
    12,540.52x = 18,810.78 × 4,219
  4. Step 4: Simplify right side
    12,540.52x = 79,362,680.82
  5. Step 5: Solve for x
    x = 79,362,680.82/12,540.52
  6. Step 6: Final answer
    x = 6,328.50

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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.