Home / 13,308.80-18,309.53-12,939.74

Finding the Fourth Proportional to 13,308.80, 18,309.53 and 12,939.74

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Solution

The fourth proportional to 13,308.80, 18,309.53 and 12,939.74 is: 17,801.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,308.80 : 18,309.53 = 12,939.74 : x
  2. Step 2: Convert to fraction form
    13,308.80/18,309.53 = 12,939.74/x
  3. Step 3: Cross multiply
    13,308.80x = 18,309.53 × 12,939.74
  4. Step 4: Simplify right side
    13,308.80x = 236,920,401.48
  5. Step 5: Solve for x
    x = 236,920,401.48/13,308.80
  6. Step 6: Final answer
    x = 17,801.79

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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.