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Finding the Fourth Proportional to 7,911.88, 10,918.05 and 4,554.81

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Solution

The fourth proportional to 7,911.88, 10,918.05 and 4,554.81 is: 6,285.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.88 : 10,918.05 = 4,554.81 : x
  2. Step 2: Convert to fraction form
    7,911.88/10,918.05 = 4,554.81/x
  3. Step 3: Cross multiply
    7,911.88x = 10,918.05 × 4,554.81
  4. Step 4: Simplify right side
    7,911.88x = 49,729,643.32
  5. Step 5: Solve for x
    x = 49,729,643.32/7,911.88
  6. Step 6: Final answer
    x = 6,285.44

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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.