Home / 28,987.20-40,003.20-16,409.60

Finding the Fourth Proportional to 28,987.20, 40,003.20 and 16,409.60

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Solution

The fourth proportional to 28,987.20, 40,003.20 and 16,409.60 is: 22,645.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,987.20 : 40,003.20 = 16,409.60 : x
  2. Step 2: Convert to fraction form
    28,987.20/40,003.20 = 16,409.60/x
  3. Step 3: Cross multiply
    28,987.20x = 40,003.20 × 16,409.60
  4. Step 4: Simplify right side
    28,987.20x = 656,436,510.72
  5. Step 5: Solve for x
    x = 656,436,510.72/28,987.20
  6. Step 6: Final answer
    x = 22,645.74

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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.