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Finding the Fourth Proportional to 53,730.60, 80,571.60 and 20,439.60

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Solution

The fourth proportional to 53,730.60, 80,571.60 and 20,439.60 is: 30,650.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,730.60 : 80,571.60 = 20,439.60 : x
  2. Step 2: Convert to fraction form
    53,730.60/80,571.60 = 20,439.60/x
  3. Step 3: Cross multiply
    53,730.60x = 80,571.60 × 20,439.60
  4. Step 4: Simplify right side
    53,730.60x = 1,646,851,275.36
  5. Step 5: Solve for x
    x = 1,646,851,275.36/53,730.60
  6. Step 6: Final answer
    x = 30,650.16

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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.