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Finding the Fourth Proportional to 8,658.83, 12,988.89 and 2,957.51

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Solution

The fourth proportional to 8,658.83, 12,988.89 and 2,957.51 is: 4,436.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.83 : 12,988.89 = 2,957.51 : x
  2. Step 2: Convert to fraction form
    8,658.83/12,988.89 = 2,957.51/x
  3. Step 3: Cross multiply
    8,658.83x = 12,988.89 × 2,957.51
  4. Step 4: Simplify right side
    8,658.83x = 38,414,804.54
  5. Step 5: Solve for x
    x = 38,414,804.54/8,658.83
  6. Step 6: Final answer
    x = 4,436.49

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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.