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Finding the Fourth Proportional to 30,297.60, 45,446.40 and 19,216.80

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Solution

The fourth proportional to 30,297.60, 45,446.40 and 19,216.80 is: 28,825.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,297.60 : 45,446.40 = 19,216.80 : x
  2. Step 2: Convert to fraction form
    30,297.60/45,446.40 = 19,216.80/x
  3. Step 3: Cross multiply
    30,297.60x = 45,446.40 × 19,216.80
  4. Step 4: Simplify right side
    30,297.60x = 873,334,379.52
  5. Step 5: Solve for x
    x = 873,334,379.52/30,297.60
  6. Step 6: Final answer
    x = 28,825.20

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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.