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Finding the Fourth Proportional to 12,693.46, 19,040.19 and 3,928.45

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Solution

The fourth proportional to 12,693.46, 19,040.19 and 3,928.45 is: 5,892.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,693.46 : 19,040.19 = 3,928.45 : x
  2. Step 2: Convert to fraction form
    12,693.46/19,040.19 = 3,928.45/x
  3. Step 3: Cross multiply
    12,693.46x = 19,040.19 × 3,928.45
  4. Step 4: Simplify right side
    12,693.46x = 74,798,434.41
  5. Step 5: Solve for x
    x = 74,798,434.41/12,693.46
  6. Step 6: Final answer
    x = 5,892.68

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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.