Home / 21,819.38-30,110.85-12,259.67

Finding the Fourth Proportional to 21,819.38, 30,110.85 and 12,259.67

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Solution

The fourth proportional to 21,819.38, 30,110.85 and 12,259.67 is: 16,918.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,819.38 : 30,110.85 = 12,259.67 : x
  2. Step 2: Convert to fraction form
    21,819.38/30,110.85 = 12,259.67/x
  3. Step 3: Cross multiply
    21,819.38x = 30,110.85 × 12,259.67
  4. Step 4: Simplify right side
    21,819.38x = 369,148,933.87
  5. Step 5: Solve for x
    x = 369,148,933.87/21,819.38
  6. Step 6: Final answer
    x = 16,918.40

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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.