Home / 13,119.09-19,680.80-6,545.49

Finding the Fourth Proportional to 13,119.09, 19,680.80 and 6,545.49

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Solution

The fourth proportional to 13,119.09, 19,680.80 and 6,545.49 is: 9,819.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.09 : 19,680.80 = 6,545.49 : x
  2. Step 2: Convert to fraction form
    13,119.09/19,680.80 = 6,545.49/x
  3. Step 3: Cross multiply
    13,119.09x = 19,680.80 × 6,545.49
  4. Step 4: Simplify right side
    13,119.09x = 128,820,446.86
  5. Step 5: Solve for x
    x = 128,820,446.86/13,119.09
  6. Step 6: Final answer
    x = 9,819.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.