Home / 12,488.34-18,732.08-3,128.44

Finding the Fourth Proportional to 12,488.34, 18,732.08 and 3,128.44

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Solution

The fourth proportional to 12,488.34, 18,732.08 and 3,128.44 is: 4,692.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,488.34 : 18,732.08 = 3,128.44 : x
  2. Step 2: Convert to fraction form
    12,488.34/18,732.08 = 3,128.44/x
  3. Step 3: Cross multiply
    12,488.34x = 18,732.08 × 3,128.44
  4. Step 4: Simplify right side
    12,488.34x = 58,602,260.58
  5. Step 5: Solve for x
    x = 58,602,260.58/12,488.34
  6. Step 6: Final answer
    x = 4,692.56

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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.