Home / 30,515.20-45,849.60-19,427.20

Finding the Fourth Proportional to 30,515.20, 45,849.60 and 19,427.20

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Solution

The fourth proportional to 30,515.20, 45,849.60 and 19,427.20 is: 29,189.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,515.20 : 45,849.60 = 19,427.20 : x
  2. Step 2: Convert to fraction form
    30,515.20/45,849.60 = 19,427.20/x
  3. Step 3: Cross multiply
    30,515.20x = 45,849.60 × 19,427.20
  4. Step 4: Simplify right side
    30,515.20x = 890,729,349.12
  5. Step 5: Solve for x
    x = 890,729,349.12/30,515.20
  6. Step 6: Final answer
    x = 29,189.69

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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.