Home / 5,158.56-7,118.70-2,800.68

Finding the Fourth Proportional to 5,158.56, 7,118.70 and 2,800.68

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Solution

The fourth proportional to 5,158.56, 7,118.70 and 2,800.68 is: 3,864.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158.56 : 7,118.70 = 2,800.68 : x
  2. Step 2: Convert to fraction form
    5,158.56/7,118.70 = 2,800.68/x
  3. Step 3: Cross multiply
    5,158.56x = 7,118.70 × 2,800.68
  4. Step 4: Simplify right side
    5,158.56x = 19,937,200.72
  5. Step 5: Solve for x
    x = 19,937,200.72/5,158.56
  6. Step 6: Final answer
    x = 3,864.88

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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.