Home / 13,378.78-20,068.89-5,579.74

Finding the Fourth Proportional to 13,378.78, 20,068.89 and 5,579.74

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Solution

The fourth proportional to 13,378.78, 20,068.89 and 5,579.74 is: 8,369.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,378.78 : 20,068.89 = 5,579.74 : x
  2. Step 2: Convert to fraction form
    13,378.78/20,068.89 = 5,579.74/x
  3. Step 3: Cross multiply
    13,378.78x = 20,068.89 × 5,579.74
  4. Step 4: Simplify right side
    13,378.78x = 111,979,188.29
  5. Step 5: Solve for x
    x = 111,979,188.29/13,378.78
  6. Step 6: Final answer
    x = 8,369.91

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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.