Home / 18,923.40-28,389.75-6,443.31

Finding the Fourth Proportional to 18,923.40, 28,389.75 and 6,443.31

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Solution

The fourth proportional to 18,923.40, 28,389.75 and 6,443.31 is: 9,666.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923.40 : 28,389.75 = 6,443.31 : x
  2. Step 2: Convert to fraction form
    18,923.40/28,389.75 = 6,443.31/x
  3. Step 3: Cross multiply
    18,923.40x = 28,389.75 × 6,443.31
  4. Step 4: Simplify right side
    18,923.40x = 182,923,960.07
  5. Step 5: Solve for x
    x = 182,923,960.07/18,923.40
  6. Step 6: Final answer
    x = 9,666.55

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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.