Home / 12,430.40-18,643.80-3,664.88

Finding the Fourth Proportional to 12,430.40, 18,643.80 and 3,664.88

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Solution

The fourth proportional to 12,430.40, 18,643.80 and 3,664.88 is: 5,496.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,430.40 : 18,643.80 = 3,664.88 : x
  2. Step 2: Convert to fraction form
    12,430.40/18,643.80 = 3,664.88/x
  3. Step 3: Cross multiply
    12,430.40x = 18,643.80 × 3,664.88
  4. Step 4: Simplify right side
    12,430.40x = 68,327,289.74
  5. Step 5: Solve for x
    x = 68,327,289.74/12,430.40
  6. Step 6: Final answer
    x = 5,496.79

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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.