Home / 21,174.57-31,868.21-15,936.71

Finding the Fourth Proportional to 21,174.57, 31,868.21 and 15,936.71

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Solution

The fourth proportional to 21,174.57, 31,868.21 and 15,936.71 is: 23,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,174.57 : 31,868.21 = 15,936.71 : x
  2. Step 2: Convert to fraction form
    21,174.57/31,868.21 = 15,936.71/x
  3. Step 3: Cross multiply
    21,174.57x = 31,868.21 × 15,936.71
  4. Step 4: Simplify right side
    21,174.57x = 507,874,181.96
  5. Step 5: Solve for x
    x = 507,874,181.96/21,174.57
  6. Step 6: Final answer
    x = 23,985.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.