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Finding the Fourth Proportional to 12,561.10, 18,851.01 and 4,785.10

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Solution

The fourth proportional to 12,561.10, 18,851.01 and 4,785.10 is: 7,181.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,561.10 : 18,851.01 = 4,785.10 : x
  2. Step 2: Convert to fraction form
    12,561.10/18,851.01 = 4,785.10/x
  3. Step 3: Cross multiply
    12,561.10x = 18,851.01 × 4,785.10
  4. Step 4: Simplify right side
    12,561.10x = 90,203,967.95
  5. Step 5: Solve for x
    x = 90,203,967.95/12,561.10
  6. Step 6: Final answer
    x = 7,181.22

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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.