Home / 13,681.09-20,515.15-6,747.49

Finding the Fourth Proportional to 13,681.09, 20,515.15 and 6,747.49

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Solution

The fourth proportional to 13,681.09, 20,515.15 and 6,747.49 is: 10,118.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,681.09 : 20,515.15 = 6,747.49 : x
  2. Step 2: Convert to fraction form
    13,681.09/20,515.15 = 6,747.49/x
  3. Step 3: Cross multiply
    13,681.09x = 20,515.15 × 6,747.49
  4. Step 4: Simplify right side
    13,681.09x = 138,425,769.47
  5. Step 5: Solve for x
    x = 138,425,769.47/13,681.09
  6. Step 6: Final answer
    x = 10,118.04

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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.