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Finding the Fourth Proportional to 25,810.89, 38,721.38 and 8,279.37

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Solution

The fourth proportional to 25,810.89, 38,721.38 and 8,279.37 is: 12,420.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,810.89 : 38,721.38 = 8,279.37 : x
  2. Step 2: Convert to fraction form
    25,810.89/38,721.38 = 8,279.37/x
  3. Step 3: Cross multiply
    25,810.89x = 38,721.38 × 8,279.37
  4. Step 4: Simplify right side
    25,810.89x = 320,588,590.53
  5. Step 5: Solve for x
    x = 320,588,590.53/25,810.89
  6. Step 6: Final answer
    x = 12,420.67

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1.5x scale

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.