Home / 5,158.12-7,118-2,800.20

Finding the Fourth Proportional to 5,158.12, 7,118 and 2,800.20

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Solution

The fourth proportional to 5,158.12, 7,118 and 2,800.20 is: 3,864.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158.12 : 7,118 = 2,800.20 : x
  2. Step 2: Convert to fraction form
    5,158.12/7,118 = 2,800.20/x
  3. Step 3: Cross multiply
    5,158.12x = 7,118 × 2,800.20
  4. Step 4: Simplify right side
    5,158.12x = 19,931,823.60
  5. Step 5: Solve for x
    x = 19,931,823.60/5,158.12
  6. Step 6: Final answer
    x = 3,864.16

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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.