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Finding the Fourth Proportional to 12,658.21, 18,973.98 and 4,755.58

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Solution

The fourth proportional to 12,658.21, 18,973.98 and 4,755.58 is: 7,128.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658.21 : 18,973.98 = 4,755.58 : x
  2. Step 2: Convert to fraction form
    12,658.21/18,973.98 = 4,755.58/x
  3. Step 3: Cross multiply
    12,658.21x = 18,973.98 × 4,755.58
  4. Step 4: Simplify right side
    12,658.21x = 90,232,232.37
  5. Step 5: Solve for x
    x = 90,232,232.37/12,658.21
  6. Step 6: Final answer
    x = 7,128.36

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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.