Home / 28,362.24-39,131.04-15,784.80

Finding the Fourth Proportional to 28,362.24, 39,131.04 and 15,784.80

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Solution

The fourth proportional to 28,362.24, 39,131.04 and 15,784.80 is: 21,778.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.24 : 39,131.04 = 15,784.80 : x
  2. Step 2: Convert to fraction form
    28,362.24/39,131.04 = 15,784.80/x
  3. Step 3: Cross multiply
    28,362.24x = 39,131.04 × 15,784.80
  4. Step 4: Simplify right side
    28,362.24x = 617,675,640.19
  5. Step 5: Solve for x
    x = 617,675,640.19/28,362.24
  6. Step 6: Final answer
    x = 21,778.10

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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.