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Finding the Fourth Proportional to 12,602.79, 18,905.22 and 3,837.78

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Solution

The fourth proportional to 12,602.79, 18,905.22 and 3,837.78 is: 5,756.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,602.79 : 18,905.22 = 3,837.78 : x
  2. Step 2: Convert to fraction form
    12,602.79/18,905.22 = 3,837.78/x
  3. Step 3: Cross multiply
    12,602.79x = 18,905.22 × 3,837.78
  4. Step 4: Simplify right side
    12,602.79x = 72,554,075.21
  5. Step 5: Solve for x
    x = 72,554,075.21/12,602.79
  6. Step 6: Final answer
    x = 5,756.99

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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.