Home / 30,631.33-45,915-20,771.20

Finding the Fourth Proportional to 30,631.33, 45,915 and 20,771.20

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Solution

The fourth proportional to 30,631.33, 45,915 and 20,771.20 is: 31,135.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,631.33 : 45,915 = 20,771.20 : x
  2. Step 2: Convert to fraction form
    30,631.33/45,915 = 20,771.20/x
  3. Step 3: Cross multiply
    30,631.33x = 45,915 × 20,771.20
  4. Step 4: Simplify right side
    30,631.33x = 953,709,648
  5. Step 5: Solve for x
    x = 953,709,648/30,631.33
  6. Step 6: Final answer
    x = 31,135.10

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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.