Home / 7,908.90-11,861.64-2,978.88

Finding the Fourth Proportional to 7,908.90, 11,861.64 and 2,978.88

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Solution

The fourth proportional to 7,908.90, 11,861.64 and 2,978.88 is: 4,467.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,908.90 : 11,861.64 = 2,978.88 : x
  2. Step 2: Convert to fraction form
    7,908.90/11,861.64 = 2,978.88/x
  3. Step 3: Cross multiply
    7,908.90x = 11,861.64 × 2,978.88
  4. Step 4: Simplify right side
    7,908.90x = 35,334,402.16
  5. Step 5: Solve for x
    x = 35,334,402.16/7,908.90
  6. Step 6: Final answer
    x = 4,467.68

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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.