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Finding the Fourth Proportional to 30,640.21, 45,970.22 and 15,046.90

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Solution

The fourth proportional to 30,640.21, 45,970.22 and 15,046.90 is: 22,575.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,640.21 : 45,970.22 = 15,046.90 : x
  2. Step 2: Convert to fraction form
    30,640.21/45,970.22 = 15,046.90/x
  3. Step 3: Cross multiply
    30,640.21x = 45,970.22 × 15,046.90
  4. Step 4: Simplify right side
    30,640.21x = 691,709,303.32
  5. Step 5: Solve for x
    x = 691,709,303.32/30,640.21
  6. Step 6: Final answer
    x = 22,575.21

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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.