Home / 28,722.14-39,642.23-18,636.42

Finding the Fourth Proportional to 28,722.14, 39,642.23 and 18,636.42

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Solution

The fourth proportional to 28,722.14, 39,642.23 and 18,636.42 is: 25,721.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,722.14 : 39,642.23 = 18,636.42 : x
  2. Step 2: Convert to fraction form
    28,722.14/39,642.23 = 18,636.42/x
  3. Step 3: Cross multiply
    28,722.14x = 39,642.23 × 18,636.42
  4. Step 4: Simplify right side
    28,722.14x = 738,789,294.61
  5. Step 5: Solve for x
    x = 738,789,294.61/28,722.14
  6. Step 6: Final answer
    x = 25,721.95

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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.