Home / 18,823.40-28,239.83-13,287.54

Finding the Fourth Proportional to 18,823.40, 28,239.83 and 13,287.54

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Solution

The fourth proportional to 18,823.40, 28,239.83 and 13,287.54 is: 19,934.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,823.40 : 28,239.83 = 13,287.54 : x
  2. Step 2: Convert to fraction form
    18,823.40/28,239.83 = 13,287.54/x
  3. Step 3: Cross multiply
    18,823.40x = 28,239.83 × 13,287.54
  4. Step 4: Simplify right side
    18,823.40x = 375,237,804.28
  5. Step 5: Solve for x
    x = 375,237,804.28/18,823.40
  6. Step 6: Final answer
    x = 19,934.65

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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.