Home / 20,604.81-30,830.63-12,289.35

Finding the Fourth Proportional to 20,604.81, 30,830.63 and 12,289.35

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Solution

The fourth proportional to 20,604.81, 30,830.63 and 12,289.35 is: 18,388.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604.81 : 30,830.63 = 12,289.35 : x
  2. Step 2: Convert to fraction form
    20,604.81/30,830.63 = 12,289.35/x
  3. Step 3: Cross multiply
    20,604.81x = 30,830.63 × 12,289.35
  4. Step 4: Simplify right side
    20,604.81x = 378,888,341.34
  5. Step 5: Solve for x
    x = 378,888,341.34/20,604.81
  6. Step 6: Final answer
    x = 18,388.34

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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.