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Finding the Fourth Proportional to 6,467.90, 8,921.49 and 5,287.10

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Solution

The fourth proportional to 6,467.90, 8,921.49 and 5,287.10 is: 7,292.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,467.90 : 8,921.49 = 5,287.10 : x
  2. Step 2: Convert to fraction form
    6,467.90/8,921.49 = 5,287.10/x
  3. Step 3: Cross multiply
    6,467.90x = 8,921.49 × 5,287.10
  4. Step 4: Simplify right side
    6,467.90x = 47,168,809.78
  5. Step 5: Solve for x
    x = 47,168,809.78/6,467.90
  6. Step 6: Final answer
    x = 7,292.75

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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.