Home / 5,145.34-7,716.40-1,858

Finding the Fourth Proportional to 5,145.34, 7,716.40 and 1,858

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Solution

The fourth proportional to 5,145.34, 7,716.40 and 1,858 is: 2,786.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.34 : 7,716.40 = 1,858 : x
  2. Step 2: Convert to fraction form
    5,145.34/7,716.40 = 1,858/x
  3. Step 3: Cross multiply
    5,145.34x = 7,716.40 × 1,858
  4. Step 4: Simplify right side
    5,145.34x = 14,337,071.20
  5. Step 5: Solve for x
    x = 14,337,071.20/5,145.34
  6. Step 6: Final answer
    x = 2,786.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.