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Finding the Fourth Proportional to 12,647.95, 18,970.02 and 7,953.64

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Solution

The fourth proportional to 12,647.95, 18,970.02 and 7,953.64 is: 11,929.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,647.95 : 18,970.02 = 7,953.64 : x
  2. Step 2: Convert to fraction form
    12,647.95/18,970.02 = 7,953.64/x
  3. Step 3: Cross multiply
    12,647.95x = 18,970.02 × 7,953.64
  4. Step 4: Simplify right side
    12,647.95x = 150,880,791.52
  5. Step 5: Solve for x
    x = 150,880,791.52/12,647.95
  6. Step 6: Final answer
    x = 11,929.27

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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.