Home / 21,165.82-31,748.81-5,370.87

Finding the Fourth Proportional to 21,165.82, 31,748.81 and 5,370.87

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Solution

The fourth proportional to 21,165.82, 31,748.81 and 5,370.87 is: 8,056.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,165.82 : 31,748.81 = 5,370.87 : x
  2. Step 2: Convert to fraction form
    21,165.82/31,748.81 = 5,370.87/x
  3. Step 3: Cross multiply
    21,165.82x = 31,748.81 × 5,370.87
  4. Step 4: Simplify right side
    21,165.82x = 170,518,731.16
  5. Step 5: Solve for x
    x = 170,518,731.16/21,165.82
  6. Step 6: Final answer
    x = 8,056.33

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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.