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Finding the Fourth Proportional to 28,739.80, 43,109.70 and 25,726.60

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Solution

The fourth proportional to 28,739.80, 43,109.70 and 25,726.60 is: 38,589.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,739.80 : 43,109.70 = 25,726.60 : x
  2. Step 2: Convert to fraction form
    28,739.80/43,109.70 = 25,726.60/x
  3. Step 3: Cross multiply
    28,739.80x = 43,109.70 × 25,726.60
  4. Step 4: Simplify right side
    28,739.80x = 1,109,066,008.02
  5. Step 5: Solve for x
    x = 1,109,066,008.02/28,739.80
  6. Step 6: Final answer
    x = 38,589.90

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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.