Home / 13,428.19-18,530.78-7,459.85

Finding the Fourth Proportional to 13,428.19, 18,530.78 and 7,459.85

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Solution

The fourth proportional to 13,428.19, 18,530.78 and 7,459.85 is: 10,294.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.19 : 18,530.78 = 7,459.85 : x
  2. Step 2: Convert to fraction form
    13,428.19/18,530.78 = 7,459.85/x
  3. Step 3: Cross multiply
    13,428.19x = 18,530.78 × 7,459.85
  4. Step 4: Simplify right side
    13,428.19x = 138,236,839.18
  5. Step 5: Solve for x
    x = 138,236,839.18/13,428.19
  6. Step 6: Final answer
    x = 10,294.53

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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.