Home / 12,420.03-17,133.62-7,380.69

Finding the Fourth Proportional to 12,420.03, 17,133.62 and 7,380.69

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Solution

The fourth proportional to 12,420.03, 17,133.62 and 7,380.69 is: 10,181.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.03 : 17,133.62 = 7,380.69 : x
  2. Step 2: Convert to fraction form
    12,420.03/17,133.62 = 7,380.69/x
  3. Step 3: Cross multiply
    12,420.03x = 17,133.62 × 7,380.69
  4. Step 4: Simplify right side
    12,420.03x = 126,457,894.96
  5. Step 5: Solve for x
    x = 126,457,894.96/12,420.03
  6. Step 6: Final answer
    x = 10,181.77

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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.