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Finding the Fourth Proportional to 12,671.86, 19,007.85 and 4,354.28

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Solution

The fourth proportional to 12,671.86, 19,007.85 and 4,354.28 is: 6,531.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,671.86 : 19,007.85 = 4,354.28 : x
  2. Step 2: Convert to fraction form
    12,671.86/19,007.85 = 4,354.28/x
  3. Step 3: Cross multiply
    12,671.86x = 19,007.85 × 4,354.28
  4. Step 4: Simplify right side
    12,671.86x = 82,765,501.10
  5. Step 5: Solve for x
    x = 82,765,501.10/12,671.86
  6. Step 6: Final answer
    x = 6,531.44

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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.