Home / 28,356.36-39,131.88-16,420.32

Finding the Fourth Proportional to 28,356.36, 39,131.88 and 16,420.32

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Solution

The fourth proportional to 28,356.36, 39,131.88 and 16,420.32 is: 22,660.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.36 : 39,131.88 = 16,420.32 : x
  2. Step 2: Convert to fraction form
    28,356.36/39,131.88 = 16,420.32/x
  3. Step 3: Cross multiply
    28,356.36x = 39,131.88 × 16,420.32
  4. Step 4: Simplify right side
    28,356.36x = 642,557,991.80
  5. Step 5: Solve for x
    x = 642,557,991.80/28,356.36
  6. Step 6: Final answer
    x = 22,660.10

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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.