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Finding the Fourth Proportional to 35,679.80, 53,454.90 and 21,812.60

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Solution

The fourth proportional to 35,679.80, 53,454.90 and 21,812.60 is: 32,679.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,679.80 : 53,454.90 = 21,812.60 : x
  2. Step 2: Convert to fraction form
    35,679.80/53,454.90 = 21,812.60/x
  3. Step 3: Cross multiply
    35,679.80x = 53,454.90 × 21,812.60
  4. Step 4: Simplify right side
    35,679.80x = 1,165,990,351.74
  5. Step 5: Solve for x
    x = 1,165,990,351.74/35,679.80
  6. Step 6: Final answer
    x = 32,679.28

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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.