Home / 30,151.85-45,153.96-21,245.29

Finding the Fourth Proportional to 30,151.85, 45,153.96 and 21,245.29

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Solution

The fourth proportional to 30,151.85, 45,153.96 and 21,245.29 is: 31,815.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,151.85 : 45,153.96 = 21,245.29 : x
  2. Step 2: Convert to fraction form
    30,151.85/45,153.96 = 21,245.29/x
  3. Step 3: Cross multiply
    30,151.85x = 45,153.96 × 21,245.29
  4. Step 4: Simplify right side
    30,151.85x = 959,308,782.29
  5. Step 5: Solve for x
    x = 959,308,782.29/30,151.85
  6. Step 6: Final answer
    x = 31,815.92

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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.