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Finding the Fourth Proportional to 8,277.60, 12,420.54 and 5,156.64

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Solution

The fourth proportional to 8,277.60, 12,420.54 and 5,156.64 is: 7,737.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,277.60 : 12,420.54 = 5,156.64 : x
  2. Step 2: Convert to fraction form
    8,277.60/12,420.54 = 5,156.64/x
  3. Step 3: Cross multiply
    8,277.60x = 12,420.54 × 5,156.64
  4. Step 4: Simplify right side
    8,277.60x = 64,048,253.39
  5. Step 5: Solve for x
    x = 64,048,253.39/8,277.60
  6. Step 6: Final answer
    x = 7,737.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.