Home / 5,412.80-8,123.32-2,126.72

Finding the Fourth Proportional to 5,412.80, 8,123.32 and 2,126.72

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Solution

The fourth proportional to 5,412.80, 8,123.32 and 2,126.72 is: 3,191.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,412.80 : 8,123.32 = 2,126.72 : x
  2. Step 2: Convert to fraction form
    5,412.80/8,123.32 = 2,126.72/x
  3. Step 3: Cross multiply
    5,412.80x = 8,123.32 × 2,126.72
  4. Step 4: Simplify right side
    5,412.80x = 17,276,027.11
  5. Step 5: Solve for x
    x = 17,276,027.11/5,412.80
  6. Step 6: Final answer
    x = 3,191.70

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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.