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Finding the Fourth Proportional to 30,348.60, 45,620.10 and 21,643.80

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Solution

The fourth proportional to 30,348.60, 45,620.10 and 21,643.80 is: 32,535.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,348.60 : 45,620.10 = 21,643.80 : x
  2. Step 2: Convert to fraction form
    30,348.60/45,620.10 = 21,643.80/x
  3. Step 3: Cross multiply
    30,348.60x = 45,620.10 × 21,643.80
  4. Step 4: Simplify right side
    30,348.60x = 987,392,320.38
  5. Step 5: Solve for x
    x = 987,392,320.38/30,348.60
  6. Step 6: Final answer
    x = 32,535.02

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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.