Home / 28,485.20-39,309-17,310.80

Finding the Fourth Proportional to 28,485.20, 39,309 and 17,310.80

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Solution

The fourth proportional to 28,485.20, 39,309 and 17,310.80 is: 23,888.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.20 : 39,309 = 17,310.80 : x
  2. Step 2: Convert to fraction form
    28,485.20/39,309 = 17,310.80/x
  3. Step 3: Cross multiply
    28,485.20x = 39,309 × 17,310.80
  4. Step 4: Simplify right side
    28,485.20x = 680,470,237.20
  5. Step 5: Solve for x
    x = 680,470,237.20/28,485.20
  6. Step 6: Final answer
    x = 23,888.55

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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.