Home / 5,158.86-7,119.18-2,800.86

Finding the Fourth Proportional to 5,158.86, 7,119.18 and 2,800.86

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Solution

The fourth proportional to 5,158.86, 7,119.18 and 2,800.86 is: 3,865.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158.86 : 7,119.18 = 2,800.86 : x
  2. Step 2: Convert to fraction form
    5,158.86/7,119.18 = 2,800.86/x
  3. Step 3: Cross multiply
    5,158.86x = 7,119.18 × 2,800.86
  4. Step 4: Simplify right side
    5,158.86x = 19,939,826.49
  5. Step 5: Solve for x
    x = 19,939,826.49/5,158.86
  6. Step 6: Final answer
    x = 3,865.16

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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.