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Finding the Fourth Proportional to 5,158.66, 7,119.11 and 2,800.95

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Solution

The fourth proportional to 5,158.66, 7,119.11 and 2,800.95 is: 3,865.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158.66 : 7,119.11 = 2,800.95 : x
  2. Step 2: Convert to fraction form
    5,158.66/7,119.11 = 2,800.95/x
  3. Step 3: Cross multiply
    5,158.66x = 7,119.11 × 2,800.95
  4. Step 4: Simplify right side
    5,158.66x = 19,940,271.15
  5. Step 5: Solve for x
    x = 19,940,271.15/5,158.66
  6. Step 6: Final answer
    x = 3,865.40

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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.