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Finding the Fourth Proportional to 7,144.00, 9,857.90 and 4,159.20

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Solution

The fourth proportional to 7,144.00, 9,857.90 and 4,159.20 is: 5,739.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,144.00 : 9,857.90 = 4,159.20 : x
  2. Step 2: Convert to fraction form
    7,144.00/9,857.90 = 4,159.20/x
  3. Step 3: Cross multiply
    7,144.00x = 9,857.90 × 4,159.20
  4. Step 4: Simplify right side
    7,144.00x = 41,000,969.59
  5. Step 5: Solve for x
    x = 41,000,969.59/7,144.00
  6. Step 6: Final answer
    x = 5,739.22

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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.