Home / 5,158.60-7,118.79-2,800.72

Finding the Fourth Proportional to 5,158.60, 7,118.79 and 2,800.72

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Solution

The fourth proportional to 5,158.60, 7,118.79 and 2,800.72 is: 3,864.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158.60 : 7,118.79 = 2,800.72 : x
  2. Step 2: Convert to fraction form
    5,158.60/7,118.79 = 2,800.72/x
  3. Step 3: Cross multiply
    5,158.60x = 7,118.79 × 2,800.72
  4. Step 4: Simplify right side
    5,158.60x = 19,937,737.53
  5. Step 5: Solve for x
    x = 19,937,737.53/5,158.60
  6. Step 6: Final answer
    x = 3,864.95

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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.