Home / 13,720.28-18,933.71-7,752.20

Finding the Fourth Proportional to 13,720.28, 18,933.71 and 7,752.20

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Solution

The fourth proportional to 13,720.28, 18,933.71 and 7,752.20 is: 10,697.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.28 : 18,933.71 = 7,752.20 : x
  2. Step 2: Convert to fraction form
    13,720.28/18,933.71 = 7,752.20/x
  3. Step 3: Cross multiply
    13,720.28x = 18,933.71 × 7,752.20
  4. Step 4: Simplify right side
    13,720.28x = 146,777,773.23
  5. Step 5: Solve for x
    x = 146,777,773.23/13,720.28
  6. Step 6: Final answer
    x = 10,697.87

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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.