Home / 13,520.38-18,656.24-7,551.28

Finding the Fourth Proportional to 13,520.38, 18,656.24 and 7,551.28

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Solution

The fourth proportional to 13,520.38, 18,656.24 and 7,551.28 is: 10,419.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.38 : 18,656.24 = 7,551.28 : x
  2. Step 2: Convert to fraction form
    13,520.38/18,656.24 = 7,551.28/x
  3. Step 3: Cross multiply
    13,520.38x = 18,656.24 × 7,551.28
  4. Step 4: Simplify right side
    13,520.38x = 140,878,491.99
  5. Step 5: Solve for x
    x = 140,878,491.99/13,520.38
  6. Step 6: Final answer
    x = 10,419.71

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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.