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Finding the Fourth Proportional to 12,671.86, 19,007.80 and 3,437.86

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Solution

The fourth proportional to 12,671.86, 19,007.80 and 3,437.86 is: 5,156.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,671.86 : 19,007.80 = 3,437.86 : x
  2. Step 2: Convert to fraction form
    12,671.86/19,007.80 = 3,437.86/x
  3. Step 3: Cross multiply
    12,671.86x = 19,007.80 × 3,437.86
  4. Step 4: Simplify right side
    12,671.86x = 65,346,155.31
  5. Step 5: Solve for x
    x = 65,346,155.31/12,671.86
  6. Step 6: Final answer
    x = 5,156.79

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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.