Home / 12,819.12-17,690.40-7,230.12

Finding the Fourth Proportional to 12,819.12, 17,690.40 and 7,230.12

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Solution

The fourth proportional to 12,819.12, 17,690.40 and 7,230.12 is: 9,977.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,819.12 : 17,690.40 = 7,230.12 : x
  2. Step 2: Convert to fraction form
    12,819.12/17,690.40 = 7,230.12/x
  3. Step 3: Cross multiply
    12,819.12x = 17,690.40 × 7,230.12
  4. Step 4: Simplify right side
    12,819.12x = 127,903,714.85
  5. Step 5: Solve for x
    x = 127,903,714.85/12,819.12
  6. Step 6: Final answer
    x = 9,977.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.