Home / 13,428.12-18,530.40-7,459.92

Finding the Fourth Proportional to 13,428.12, 18,530.40 and 7,459.92

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Solution

The fourth proportional to 13,428.12, 18,530.40 and 7,459.92 is: 10,294.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.12 : 18,530.40 = 7,459.92 : x
  2. Step 2: Convert to fraction form
    13,428.12/18,530.40 = 7,459.92/x
  3. Step 3: Cross multiply
    13,428.12x = 18,530.40 × 7,459.92
  4. Step 4: Simplify right side
    13,428.12x = 138,235,301.57
  5. Step 5: Solve for x
    x = 138,235,301.57/13,428.12
  6. Step 6: Final answer
    x = 10,294.46

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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.