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Finding the Fourth Proportional to 30,276.80, 45,422.88 and 19,908.80

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Solution

The fourth proportional to 30,276.80, 45,422.88 and 19,908.80 is: 29,868.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,276.80 : 45,422.88 = 19,908.80 : x
  2. Step 2: Convert to fraction form
    30,276.80/45,422.88 = 19,908.80/x
  3. Step 3: Cross multiply
    30,276.80x = 45,422.88 × 19,908.80
  4. Step 4: Simplify right side
    30,276.80x = 904,315,033.34
  5. Step 5: Solve for x
    x = 904,315,033.34/30,276.80
  6. Step 6: Final answer
    x = 29,868.25

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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.