Home / 12,620.10-17,415.36-7,906.98

Finding the Fourth Proportional to 12,620.10, 17,415.36 and 7,906.98

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Solution

The fourth proportional to 12,620.10, 17,415.36 and 7,906.98 is: 10,911.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.10 : 17,415.36 = 7,906.98 : x
  2. Step 2: Convert to fraction form
    12,620.10/17,415.36 = 7,906.98/x
  3. Step 3: Cross multiply
    12,620.10x = 17,415.36 × 7,906.98
  4. Step 4: Simplify right side
    12,620.10x = 137,702,903.21
  5. Step 5: Solve for x
    x = 137,702,903.21/12,620.10
  6. Step 6: Final answer
    x = 10,911.40

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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.