Home / 20,826.69-31,269.30-12,071.40

Finding the Fourth Proportional to 20,826.69, 31,269.30 and 12,071.40

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Solution

The fourth proportional to 20,826.69, 31,269.30 and 12,071.40 is: 18,124.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826.69 : 31,269.30 = 12,071.40 : x
  2. Step 2: Convert to fraction form
    20,826.69/31,269.30 = 12,071.40/x
  3. Step 3: Cross multiply
    20,826.69x = 31,269.30 × 12,071.40
  4. Step 4: Simplify right side
    20,826.69x = 377,464,228.02
  5. Step 5: Solve for x
    x = 377,464,228.02/20,826.69
  6. Step 6: Final answer
    x = 18,124.06

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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.