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Finding the Fourth Proportional to 28,871.51, 43,040.39 and 28,416.54

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Solution

The fourth proportional to 28,871.51, 43,040.39 and 28,416.54 is: 42,362.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,871.51 : 43,040.39 = 28,416.54 : x
  2. Step 2: Convert to fraction form
    28,871.51/43,040.39 = 28,416.54/x
  3. Step 3: Cross multiply
    28,871.51x = 43,040.39 × 28,416.54
  4. Step 4: Simplify right side
    28,871.51x = 1,223,058,873.69
  5. Step 5: Solve for x
    x = 1,223,058,873.69/28,871.51
  6. Step 6: Final answer
    x = 42,362.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.