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Finding the Fourth Proportional to 34,485.60, 47,599.20 and 20,343

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Solution

The fourth proportional to 34,485.60, 47,599.20 and 20,343 is: 28,078.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,485.60 : 47,599.20 = 20,343 : x
  2. Step 2: Convert to fraction form
    34,485.60/47,599.20 = 20,343/x
  3. Step 3: Cross multiply
    34,485.60x = 47,599.20 × 20,343
  4. Step 4: Simplify right side
    34,485.60x = 968,310,525.60
  5. Step 5: Solve for x
    x = 968,310,525.60/34,485.60
  6. Step 6: Final answer
    x = 28,078.69

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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.