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Finding the Fourth Proportional to 7,135.90, 9,849.79 and 4,900.90

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Solution

The fourth proportional to 7,135.90, 9,849.79 and 4,900.90 is: 6,764.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,135.90 : 9,849.79 = 4,900.90 : x
  2. Step 2: Convert to fraction form
    7,135.90/9,849.79 = 4,900.90/x
  3. Step 3: Cross multiply
    7,135.90x = 9,849.79 × 4,900.90
  4. Step 4: Simplify right side
    7,135.90x = 48,272,835.81
  5. Step 5: Solve for x
    x = 48,272,835.81/7,135.90
  6. Step 6: Final answer
    x = 6,764.79

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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.