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Finding the Fourth Proportional to 8,662.58, 12,931.21 and 7,611.63

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Solution

The fourth proportional to 8,662.58, 12,931.21 and 7,611.63 is: 11,362.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,662.58 : 12,931.21 = 7,611.63 : x
  2. Step 2: Convert to fraction form
    8,662.58/12,931.21 = 7,611.63/x
  3. Step 3: Cross multiply
    8,662.58x = 12,931.21 × 7,611.63
  4. Step 4: Simplify right side
    8,662.58x = 98,427,583.36
  5. Step 5: Solve for x
    x = 98,427,583.36/8,662.58
  6. Step 6: Final answer
    x = 11,362.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.