Home / 13,120-19,579.24-11,718.72

Finding the Fourth Proportional to 13,120, 19,579.24 and 11,718.72

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Solution

The fourth proportional to 13,120, 19,579.24 and 11,718.72 is: 17,488.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120 : 19,579.24 = 11,718.72 : x
  2. Step 2: Convert to fraction form
    13,120/19,579.24 = 11,718.72/x
  3. Step 3: Cross multiply
    13,120x = 19,579.24 × 11,718.72
  4. Step 4: Simplify right side
    13,120x = 229,443,631.37
  5. Step 5: Solve for x
    x = 229,443,631.37/13,120
  6. Step 6: Final answer
    x = 17,488.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.