Home / 20,289.84-30,398.58-12,388.20

Finding the Fourth Proportional to 20,289.84, 30,398.58 and 12,388.20

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Solution

The fourth proportional to 20,289.84, 30,398.58 and 12,388.20 is: 18,560.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.84 : 30,398.58 = 12,388.20 : x
  2. Step 2: Convert to fraction form
    20,289.84/30,398.58 = 12,388.20/x
  3. Step 3: Cross multiply
    20,289.84x = 30,398.58 × 12,388.20
  4. Step 4: Simplify right side
    20,289.84x = 376,583,688.76
  5. Step 5: Solve for x
    x = 376,583,688.76/20,289.84
  6. Step 6: Final answer
    x = 18,560.21

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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.