Home / 12,780.30-19,170.52-4,460.28

Finding the Fourth Proportional to 12,780.30, 19,170.52 and 4,460.28

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Solution

The fourth proportional to 12,780.30, 19,170.52 and 4,460.28 is: 6,690.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.30 : 19,170.52 = 4,460.28 : x
  2. Step 2: Convert to fraction form
    12,780.30/19,170.52 = 4,460.28/x
  3. Step 3: Cross multiply
    12,780.30x = 19,170.52 × 4,460.28
  4. Step 4: Simplify right side
    12,780.30x = 85,505,886.95
  5. Step 5: Solve for x
    x = 85,505,886.95/12,780.30
  6. Step 6: Final answer
    x = 6,690.44

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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.