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Finding the Fourth Proportional to 34,539.55, 47,664.65 and 20,393.30

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Solution

The fourth proportional to 34,539.55, 47,664.65 and 20,393.30 is: 28,142.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,539.55 : 47,664.65 = 20,393.30 : x
  2. Step 2: Convert to fraction form
    34,539.55/47,664.65 = 20,393.30/x
  3. Step 3: Cross multiply
    34,539.55x = 47,664.65 × 20,393.30
  4. Step 4: Simplify right side
    34,539.55x = 972,039,506.85
  5. Step 5: Solve for x
    x = 972,039,506.85/34,539.55
  6. Step 6: Final answer
    x = 28,142.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.