Home / 13,720.28-18,936.74-7,752.04

Finding the Fourth Proportional to 13,720.28, 18,936.74 and 7,752.04

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Solution

The fourth proportional to 13,720.28, 18,936.74 and 7,752.04 is: 10,699.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.28 : 18,936.74 = 7,752.04 : x
  2. Step 2: Convert to fraction form
    13,720.28/18,936.74 = 7,752.04/x
  3. Step 3: Cross multiply
    13,720.28x = 18,936.74 × 7,752.04
  4. Step 4: Simplify right side
    13,720.28x = 146,798,365.95
  5. Step 5: Solve for x
    x = 146,798,365.95/13,720.28
  6. Step 6: Final answer
    x = 10,699.37

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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.