Home / 13,581.56-18,742.62-7,920.24

Finding the Fourth Proportional to 13,581.56, 18,742.62 and 7,920.24

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Solution

The fourth proportional to 13,581.56, 18,742.62 and 7,920.24 is: 10,929.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.56 : 18,742.62 = 7,920.24 : x
  2. Step 2: Convert to fraction form
    13,581.56/18,742.62 = 7,920.24/x
  3. Step 3: Cross multiply
    13,581.56x = 18,742.62 × 7,920.24
  4. Step 4: Simplify right side
    13,581.56x = 148,446,008.04
  5. Step 5: Solve for x
    x = 148,446,008.04/13,581.56
  6. Step 6: Final answer
    x = 10,929.97

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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.