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Finding the Fourth Proportional to 30,914.40, 46,344.60 and 21,021.60

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Solution

The fourth proportional to 30,914.40, 46,344.60 and 21,021.60 is: 31,514.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,914.40 : 46,344.60 = 21,021.60 : x
  2. Step 2: Convert to fraction form
    30,914.40/46,344.60 = 21,021.60/x
  3. Step 3: Cross multiply
    30,914.40x = 46,344.60 × 21,021.60
  4. Step 4: Simplify right side
    30,914.40x = 974,237,643.36
  5. Step 5: Solve for x
    x = 974,237,643.36/30,914.40
  6. Step 6: Final answer
    x = 31,514.04

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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.