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Finding the Fourth Proportional to 8,718.90, 12,055.41 and 7,611.77

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Solution

The fourth proportional to 8,718.90, 12,055.41 and 7,611.77 is: 10,524.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.90 : 12,055.41 = 7,611.77 : x
  2. Step 2: Convert to fraction form
    8,718.90/12,055.41 = 7,611.77/x
  3. Step 3: Cross multiply
    8,718.90x = 12,055.41 × 7,611.77
  4. Step 4: Simplify right side
    8,718.90x = 91,762,947.90
  5. Step 5: Solve for x
    x = 91,762,947.90/8,718.90
  6. Step 6: Final answer
    x = 10,524.60

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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.