Home / 7,420.46-11,132.91-2,978.09

Finding the Fourth Proportional to 7,420.46, 11,132.91 and 2,978.09

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Solution

The fourth proportional to 7,420.46, 11,132.91 and 2,978.09 is: 4,468.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.46 : 11,132.91 = 2,978.09 : x
  2. Step 2: Convert to fraction form
    7,420.46/11,132.91 = 2,978.09/x
  3. Step 3: Cross multiply
    7,420.46x = 11,132.91 × 2,978.09
  4. Step 4: Simplify right side
    7,420.46x = 33,154,807.94
  5. Step 5: Solve for x
    x = 33,154,807.94/7,420.46
  6. Step 6: Final answer
    x = 4,468.03

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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.