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Finding the Fourth Proportional to 6,363.78, 8,775.72 and 4,855.20

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Solution

The fourth proportional to 6,363.78, 8,775.72 and 4,855.20 is: 6,695.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,363.78 : 8,775.72 = 4,855.20 : x
  2. Step 2: Convert to fraction form
    6,363.78/8,775.72 = 4,855.20/x
  3. Step 3: Cross multiply
    6,363.78x = 8,775.72 × 4,855.20
  4. Step 4: Simplify right side
    6,363.78x = 42,607,875.74
  5. Step 5: Solve for x
    x = 42,607,875.74/6,363.78
  6. Step 6: Final answer
    x = 6,695.37

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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.