Home / 13,308.29-18,308.84-12,939.23

Finding the Fourth Proportional to 13,308.29, 18,308.84 and 12,939.23

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Solution

The fourth proportional to 13,308.29, 18,308.84 and 12,939.23 is: 17,801.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,308.29 : 18,308.84 = 12,939.23 : x
  2. Step 2: Convert to fraction form
    13,308.29/18,308.84 = 12,939.23/x
  3. Step 3: Cross multiply
    13,308.29x = 18,308.84 × 12,939.23
  4. Step 4: Simplify right side
    13,308.29x = 236,902,291.79
  5. Step 5: Solve for x
    x = 236,902,291.79/13,308.29
  6. Step 6: Final answer
    x = 17,801.11

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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.