Home / 20,271.33-30,440.70-12,529.35

Finding the Fourth Proportional to 20,271.33, 30,440.70 and 12,529.35

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Solution

The fourth proportional to 20,271.33, 30,440.70 and 12,529.35 is: 18,814.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.33 : 30,440.70 = 12,529.35 : x
  2. Step 2: Convert to fraction form
    20,271.33/30,440.70 = 12,529.35/x
  3. Step 3: Cross multiply
    20,271.33x = 30,440.70 × 12,529.35
  4. Step 4: Simplify right side
    20,271.33x = 381,402,184.55
  5. Step 5: Solve for x
    x = 381,402,184.55/20,271.33
  6. Step 6: Final answer
    x = 18,814.86

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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.