Home / 12,685.81-19,030.54-3,921.41

Finding the Fourth Proportional to 12,685.81, 19,030.54 and 3,921.41

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Solution

The fourth proportional to 12,685.81, 19,030.54 and 3,921.41 is: 5,882.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.81 : 19,030.54 = 3,921.41 : x
  2. Step 2: Convert to fraction form
    12,685.81/19,030.54 = 3,921.41/x
  3. Step 3: Cross multiply
    12,685.81x = 19,030.54 × 3,921.41
  4. Step 4: Simplify right side
    12,685.81x = 74,626,435.10
  5. Step 5: Solve for x
    x = 74,626,435.10/12,685.81
  6. Step 6: Final answer
    x = 5,882.67

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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.