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Finding the Fourth Proportional to 28,009.80, 38,643.75 and 19,041.75

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Solution

The fourth proportional to 28,009.80, 38,643.75 and 19,041.75 is: 26,270.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.80 : 38,643.75 = 19,041.75 : x
  2. Step 2: Convert to fraction form
    28,009.80/38,643.75 = 19,041.75/x
  3. Step 3: Cross multiply
    28,009.80x = 38,643.75 × 19,041.75
  4. Step 4: Simplify right side
    28,009.80x = 735,844,626.56
  5. Step 5: Solve for x
    x = 735,844,626.56/28,009.80
  6. Step 6: Final answer
    x = 26,270.97

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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.