Home / 12,971.75-19,426.45-7,408.25

Finding the Fourth Proportional to 12,971.75, 19,426.45 and 7,408.25

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Solution

The fourth proportional to 12,971.75, 19,426.45 and 7,408.25 is: 11,094.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,971.75 : 19,426.45 = 7,408.25 : x
  2. Step 2: Convert to fraction form
    12,971.75/19,426.45 = 7,408.25/x
  3. Step 3: Cross multiply
    12,971.75x = 19,426.45 × 7,408.25
  4. Step 4: Simplify right side
    12,971.75x = 143,915,998.21
  5. Step 5: Solve for x
    x = 143,915,998.21/12,971.75
  6. Step 6: Final answer
    x = 11,094.57

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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.