Home / 20,376.31-28,129.14-12,826.30

Finding the Fourth Proportional to 20,376.31, 28,129.14 and 12,826.30

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Solution

The fourth proportional to 20,376.31, 28,129.14 and 12,826.30 is: 17,706.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.31 : 28,129.14 = 12,826.30 : x
  2. Step 2: Convert to fraction form
    20,376.31/28,129.14 = 12,826.30/x
  3. Step 3: Cross multiply
    20,376.31x = 28,129.14 × 12,826.30
  4. Step 4: Simplify right side
    20,376.31x = 360,792,788.38
  5. Step 5: Solve for x
    x = 360,792,788.38/20,376.31
  6. Step 6: Final answer
    x = 17,706.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.