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Finding the Fourth Proportional to 7,889.76, 10,889.73 and 4,907.88

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Solution

The fourth proportional to 7,889.76, 10,889.73 and 4,907.88 is: 6,774.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,889.76 : 10,889.73 = 4,907.88 : x
  2. Step 2: Convert to fraction form
    7,889.76/10,889.73 = 4,907.88/x
  3. Step 3: Cross multiply
    7,889.76x = 10,889.73 × 4,907.88
  4. Step 4: Simplify right side
    7,889.76x = 53,445,488.07
  5. Step 5: Solve for x
    x = 53,445,488.07/7,889.76
  6. Step 6: Final answer
    x = 6,774.03

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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.