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Finding the Fourth Proportional to 39,485.70, 59,246.10 and 20,761.20

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Solution

The fourth proportional to 39,485.70, 59,246.10 and 20,761.20 is: 31,151.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,485.70 : 59,246.10 = 20,761.20 : x
  2. Step 2: Convert to fraction form
    39,485.70/59,246.10 = 20,761.20/x
  3. Step 3: Cross multiply
    39,485.70x = 59,246.10 × 20,761.20
  4. Step 4: Simplify right side
    39,485.70x = 1,230,020,131.32
  5. Step 5: Solve for x
    x = 1,230,020,131.32/39,485.70
  6. Step 6: Final answer
    x = 31,151.03

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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.