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Finding the Fourth Proportional to 12,671.12, 19,013.88 and 8,513.12

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Solution

The fourth proportional to 12,671.12, 19,013.88 and 8,513.12 is: 12,774.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,671.12 : 19,013.88 = 8,513.12 : x
  2. Step 2: Convert to fraction form
    12,671.12/19,013.88 = 8,513.12/x
  3. Step 3: Cross multiply
    12,671.12x = 19,013.88 × 8,513.12
  4. Step 4: Simplify right side
    12,671.12x = 161,867,442.11
  5. Step 5: Solve for x
    x = 161,867,442.11/12,671.12
  6. Step 6: Final answer
    x = 12,774.52

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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.