Home / 28,173.77-38,880.25-15,426.75

Finding the Fourth Proportional to 28,173.77, 38,880.25 and 15,426.75

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Solution

The fourth proportional to 28,173.77, 38,880.25 and 15,426.75 is: 21,289.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,173.77 : 38,880.25 = 15,426.75 : x
  2. Step 2: Convert to fraction form
    28,173.77/38,880.25 = 15,426.75/x
  3. Step 3: Cross multiply
    28,173.77x = 38,880.25 × 15,426.75
  4. Step 4: Simplify right side
    28,173.77x = 599,796,090.70
  5. Step 5: Solve for x
    x = 599,796,090.70/28,173.77
  6. Step 6: Final answer
    x = 21,289.16

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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.