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Finding the Fourth Proportional to 12,685.40, 19,033.54 and 4,899.68

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Solution

The fourth proportional to 12,685.40, 19,033.54 and 4,899.68 is: 7,351.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.40 : 19,033.54 = 4,899.68 : x
  2. Step 2: Convert to fraction form
    12,685.40/19,033.54 = 4,899.68/x
  3. Step 3: Cross multiply
    12,685.40x = 19,033.54 × 4,899.68
  4. Step 4: Simplify right side
    12,685.40x = 93,258,255.27
  5. Step 5: Solve for x
    x = 93,258,255.27/12,685.40
  6. Step 6: Final answer
    x = 7,351.62

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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.