Home / 13,340.24-18,419.64-12,345.20

Finding the Fourth Proportional to 13,340.24, 18,419.64 and 12,345.20

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Solution

The fourth proportional to 13,340.24, 18,419.64 and 12,345.20 is: 17,045.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,340.24 : 18,419.64 = 12,345.20 : x
  2. Step 2: Convert to fraction form
    13,340.24/18,419.64 = 12,345.20/x
  3. Step 3: Cross multiply
    13,340.24x = 18,419.64 × 12,345.20
  4. Step 4: Simplify right side
    13,340.24x = 227,394,139.73
  5. Step 5: Solve for x
    x = 227,394,139.73/13,340.24
  6. Step 6: Final answer
    x = 17,045.73

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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.