Home / 20,865.54-28,794.06-12,905.67

Finding the Fourth Proportional to 20,865.54, 28,794.06 and 12,905.67

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Solution

The fourth proportional to 20,865.54, 28,794.06 and 12,905.67 is: 17,809.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.54 : 28,794.06 = 12,905.67 : x
  2. Step 2: Convert to fraction form
    20,865.54/28,794.06 = 12,905.67/x
  3. Step 3: Cross multiply
    20,865.54x = 28,794.06 × 12,905.67
  4. Step 4: Simplify right side
    20,865.54x = 371,606,636.32
  5. Step 5: Solve for x
    x = 371,606,636.32/20,865.54
  6. Step 6: Final answer
    x = 17,809.59

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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.