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Finding the Fourth Proportional to 8,658.77, 12,988.22 and 4,761.05

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Solution

The fourth proportional to 8,658.77, 12,988.22 and 4,761.05 is: 7,141.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.77 : 12,988.22 = 4,761.05 : x
  2. Step 2: Convert to fraction form
    8,658.77/12,988.22 = 4,761.05/x
  3. Step 3: Cross multiply
    8,658.77x = 12,988.22 × 4,761.05
  4. Step 4: Simplify right side
    8,658.77x = 61,837,476.08
  5. Step 5: Solve for x
    x = 61,837,476.08/8,658.77
  6. Step 6: Final answer
    x = 7,141.60

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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.