Home / 13,558.79-20,343.35-6,980.78

Finding the Fourth Proportional to 13,558.79, 20,343.35 and 6,980.78

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Solution

The fourth proportional to 13,558.79, 20,343.35 and 6,980.78 is: 10,473.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,558.79 : 20,343.35 = 6,980.78 : x
  2. Step 2: Convert to fraction form
    13,558.79/20,343.35 = 6,980.78/x
  3. Step 3: Cross multiply
    13,558.79x = 20,343.35 × 6,980.78
  4. Step 4: Simplify right side
    13,558.79x = 142,012,519.12
  5. Step 5: Solve for x
    x = 142,012,519.12/13,558.79
  6. Step 6: Final answer
    x = 10,473.83

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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.