Home / 13,428.24-18,530.75-7,459.78

Finding the Fourth Proportional to 13,428.24, 18,530.75 and 7,459.78

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Solution

The fourth proportional to 13,428.24, 18,530.75 and 7,459.78 is: 10,294.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.24 : 18,530.75 = 7,459.78 : x
  2. Step 2: Convert to fraction form
    13,428.24/18,530.75 = 7,459.78/x
  3. Step 3: Cross multiply
    13,428.24x = 18,530.75 × 7,459.78
  4. Step 4: Simplify right side
    13,428.24x = 138,235,318.24
  5. Step 5: Solve for x
    x = 138,235,318.24/13,428.24
  6. Step 6: Final answer
    x = 10,294.37

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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.