Home / 25,433.40-38,139.30-12,289.80

Finding the Fourth Proportional to 25,433.40, 38,139.30 and 12,289.80

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Solution

The fourth proportional to 25,433.40, 38,139.30 and 12,289.80 is: 18,429.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,433.40 : 38,139.30 = 12,289.80 : x
  2. Step 2: Convert to fraction form
    25,433.40/38,139.30 = 12,289.80/x
  3. Step 3: Cross multiply
    25,433.40x = 38,139.30 × 12,289.80
  4. Step 4: Simplify right side
    25,433.40x = 468,724,369.14
  5. Step 5: Solve for x
    x = 468,724,369.14/25,433.40
  6. Step 6: Final answer
    x = 18,429.48

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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.