Home / 12,579.56-18,869.40-5,178.80

Finding the Fourth Proportional to 12,579.56, 18,869.40 and 5,178.80

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Solution

The fourth proportional to 12,579.56, 18,869.40 and 5,178.80 is: 7,768.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.56 : 18,869.40 = 5,178.80 : x
  2. Step 2: Convert to fraction form
    12,579.56/18,869.40 = 5,178.80/x
  3. Step 3: Cross multiply
    12,579.56x = 18,869.40 × 5,178.80
  4. Step 4: Simplify right side
    12,579.56x = 97,720,848.72
  5. Step 5: Solve for x
    x = 97,720,848.72/12,579.56
  6. Step 6: Final answer
    x = 7,768.22

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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.