Home / 5,780.89-7,977.65-3,128.30

Finding the Fourth Proportional to 5,780.89, 7,977.65 and 3,128.30

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Solution

The fourth proportional to 5,780.89, 7,977.65 and 3,128.30 is: 4,317.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,780.89 : 7,977.65 = 3,128.30 : x
  2. Step 2: Convert to fraction form
    5,780.89/7,977.65 = 3,128.30/x
  3. Step 3: Cross multiply
    5,780.89x = 7,977.65 × 3,128.30
  4. Step 4: Simplify right side
    5,780.89x = 24,956,474.48
  5. Step 5: Solve for x
    x = 24,956,474.48/5,780.89
  6. Step 6: Final answer
    x = 4,317.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.