Home / 28,860.80-43,270.08-9,128.32

Finding the Fourth Proportional to 28,860.80, 43,270.08 and 9,128.32

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Solution

The fourth proportional to 28,860.80, 43,270.08 and 9,128.32 is: 13,685.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,860.80 : 43,270.08 = 9,128.32 : x
  2. Step 2: Convert to fraction form
    28,860.80/43,270.08 = 9,128.32/x
  3. Step 3: Cross multiply
    28,860.80x = 43,270.08 × 9,128.32
  4. Step 4: Simplify right side
    28,860.80x = 394,983,136.67
  5. Step 5: Solve for x
    x = 394,983,136.67/28,860.80
  6. Step 6: Final answer
    x = 13,685.80

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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.