Home / 20,139.84-30,183.36-10,281.60

Finding the Fourth Proportional to 20,139.84, 30,183.36 and 10,281.60

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Solution

The fourth proportional to 20,139.84, 30,183.36 and 10,281.60 is: 15,408.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.84 : 30,183.36 = 10,281.60 : x
  2. Step 2: Convert to fraction form
    20,139.84/30,183.36 = 10,281.60/x
  3. Step 3: Cross multiply
    20,139.84x = 30,183.36 × 10,281.60
  4. Step 4: Simplify right side
    20,139.84x = 310,333,234.18
  5. Step 5: Solve for x
    x = 310,333,234.18/20,139.84
  6. Step 6: Final answer
    x = 15,408.92

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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.