Home / 13,309.12-18,362.56-7,719.04

Finding the Fourth Proportional to 13,309.12, 18,362.56 and 7,719.04

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Solution

The fourth proportional to 13,309.12, 18,362.56 and 7,719.04 is: 10,649.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,309.12 : 18,362.56 = 7,719.04 : x
  2. Step 2: Convert to fraction form
    13,309.12/18,362.56 = 7,719.04/x
  3. Step 3: Cross multiply
    13,309.12x = 18,362.56 × 7,719.04
  4. Step 4: Simplify right side
    13,309.12x = 141,741,335.14
  5. Step 5: Solve for x
    x = 141,741,335.14/13,309.12
  6. Step 6: Final answer
    x = 10,649.94

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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.