Home / 28,935.64-43,412.87-13,138.80

Finding the Fourth Proportional to 28,935.64, 43,412.87 and 13,138.80

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Solution

The fourth proportional to 28,935.64, 43,412.87 and 13,138.80 is: 19,712.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,935.64 : 43,412.87 = 13,138.80 : x
  2. Step 2: Convert to fraction form
    28,935.64/43,412.87 = 13,138.80/x
  3. Step 3: Cross multiply
    28,935.64x = 43,412.87 × 13,138.80
  4. Step 4: Simplify right side
    28,935.64x = 570,393,016.36
  5. Step 5: Solve for x
    x = 570,393,016.36/28,935.64
  6. Step 6: Final answer
    x = 19,712.47

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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.