Home / 12,780.31-19,170-4,460.32

Finding the Fourth Proportional to 12,780.31, 19,170 and 4,460.32

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Solution

The fourth proportional to 12,780.31, 19,170 and 4,460.32 is: 6,690.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.31 : 19,170 = 4,460.32 : x
  2. Step 2: Convert to fraction form
    12,780.31/19,170 = 4,460.32/x
  3. Step 3: Cross multiply
    12,780.31x = 19,170 × 4,460.32
  4. Step 4: Simplify right side
    12,780.31x = 85,504,334.40
  5. Step 5: Solve for x
    x = 85,504,334.40/12,780.31
  6. Step 6: Final answer
    x = 6,690.32

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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.