Home / 12,430.45-18,639.60-7,687.09

Finding the Fourth Proportional to 12,430.45, 18,639.60 and 7,687.09

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Solution

The fourth proportional to 12,430.45, 18,639.60 and 7,687.09 is: 11,526.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,430.45 : 18,639.60 = 7,687.09 : x
  2. Step 2: Convert to fraction form
    12,430.45/18,639.60 = 7,687.09/x
  3. Step 3: Cross multiply
    12,430.45x = 18,639.60 × 7,687.09
  4. Step 4: Simplify right side
    12,430.45x = 143,284,282.76
  5. Step 5: Solve for x
    x = 143,284,282.76/12,430.45
  6. Step 6: Final answer
    x = 11,526.88

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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.