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Finding the Fourth Proportional to 53,643.60, 80,407.80 and 20,350.80

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Solution

The fourth proportional to 53,643.60, 80,407.80 and 20,350.80 is: 30,504.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,643.60 : 80,407.80 = 20,350.80 : x
  2. Step 2: Convert to fraction form
    53,643.60/80,407.80 = 20,350.80/x
  3. Step 3: Cross multiply
    53,643.60x = 80,407.80 × 20,350.80
  4. Step 4: Simplify right side
    53,643.60x = 1,636,363,056.24
  5. Step 5: Solve for x
    x = 1,636,363,056.24/53,643.60
  6. Step 6: Final answer
    x = 30,504.35

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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.