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Finding the Fourth Proportional to 39,458.70, 59,205.60 and 20,734.20

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Solution

The fourth proportional to 39,458.70, 59,205.60 and 20,734.20 is: 31,110.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,458.70 : 59,205.60 = 20,734.20 : x
  2. Step 2: Convert to fraction form
    39,458.70/59,205.60 = 20,734.20/x
  3. Step 3: Cross multiply
    39,458.70x = 59,205.60 × 20,734.20
  4. Step 4: Simplify right side
    39,458.70x = 1,227,580,751.52
  5. Step 5: Solve for x
    x = 1,227,580,751.52/39,458.70
  6. Step 6: Final answer
    x = 31,110.52

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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.