Home / 12,990.12-19,460.70-6,408.60

Finding the Fourth Proportional to 12,990.12, 19,460.70 and 6,408.60

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Solution

The fourth proportional to 12,990.12, 19,460.70 and 6,408.60 is: 9,600.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.12 : 19,460.70 = 6,408.60 : x
  2. Step 2: Convert to fraction form
    12,990.12/19,460.70 = 6,408.60/x
  3. Step 3: Cross multiply
    12,990.12x = 19,460.70 × 6,408.60
  4. Step 4: Simplify right side
    12,990.12x = 124,715,842.02
  5. Step 5: Solve for x
    x = 124,715,842.02/12,990.12
  6. Step 6: Final answer
    x = 9,600.82

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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.