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Finding the Fourth Proportional to 47,728.60, 71,571.30 and 21,419.80

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Solution

The fourth proportional to 47,728.60, 71,571.30 and 21,419.80 is: 32,120.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,728.60 : 71,571.30 = 21,419.80 : x
  2. Step 2: Convert to fraction form
    47,728.60/71,571.30 = 21,419.80/x
  3. Step 3: Cross multiply
    47,728.60x = 71,571.30 × 21,419.80
  4. Step 4: Simplify right side
    47,728.60x = 1,533,042,931.74
  5. Step 5: Solve for x
    x = 1,533,042,931.74/47,728.60
  6. Step 6: Final answer
    x = 32,120.01

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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.