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Finding the Fourth Proportional to 9,410.68, 12,986.64 and 5,161.98

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Solution

The fourth proportional to 9,410.68, 12,986.64 and 5,161.98 is: 7,123.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,410.68 : 12,986.64 = 5,161.98 : x
  2. Step 2: Convert to fraction form
    9,410.68/12,986.64 = 5,161.98/x
  3. Step 3: Cross multiply
    9,410.68x = 12,986.64 × 5,161.98
  4. Step 4: Simplify right side
    9,410.68x = 67,036,775.95
  5. Step 5: Solve for x
    x = 67,036,775.95/9,410.68
  6. Step 6: Final answer
    x = 7,123.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.