Home / 28,405.48-39,199.62-15,830.68

Finding the Fourth Proportional to 28,405.48, 39,199.62 and 15,830.68

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Solution

The fourth proportional to 28,405.48, 39,199.62 and 15,830.68 is: 21,846.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.48 : 39,199.62 = 15,830.68 : x
  2. Step 2: Convert to fraction form
    28,405.48/39,199.62 = 15,830.68/x
  3. Step 3: Cross multiply
    28,405.48x = 39,199.62 × 15,830.68
  4. Step 4: Simplify right side
    28,405.48x = 620,556,640.34
  5. Step 5: Solve for x
    x = 620,556,640.34/28,405.48
  6. Step 6: Final answer
    x = 21,846.37

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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.