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Finding the Fourth Proportional to 8,621, 12,931.58 and 2,777.64

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Solution

The fourth proportional to 8,621, 12,931.58 and 2,777.64 is: 4,166.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,621 : 12,931.58 = 2,777.64 : x
  2. Step 2: Convert to fraction form
    8,621/12,931.58 = 2,777.64/x
  3. Step 3: Cross multiply
    8,621x = 12,931.58 × 2,777.64
  4. Step 4: Simplify right side
    8,621x = 35,919,273.87
  5. Step 5: Solve for x
    x = 35,919,273.87/8,621
  6. Step 6: Final answer
    x = 4,166.49

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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.