Home / 13,757.04-18,987.48-8,171.28

Finding the Fourth Proportional to 13,757.04, 18,987.48 and 8,171.28

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Solution

The fourth proportional to 13,757.04, 18,987.48 and 8,171.28 is: 11,278.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,757.04 : 18,987.48 = 8,171.28 : x
  2. Step 2: Convert to fraction form
    13,757.04/18,987.48 = 8,171.28/x
  3. Step 3: Cross multiply
    13,757.04x = 18,987.48 × 8,171.28
  4. Step 4: Simplify right side
    13,757.04x = 155,152,015.57
  5. Step 5: Solve for x
    x = 155,152,015.57/13,757.04
  6. Step 6: Final answer
    x = 11,278.01

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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.