Home / 21,130.74-29,160.63-11,699.82

Finding the Fourth Proportional to 21,130.74, 29,160.63 and 11,699.82

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Solution

The fourth proportional to 21,130.74, 29,160.63 and 11,699.82 is: 16,145.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.74 : 29,160.63 = 11,699.82 : x
  2. Step 2: Convert to fraction form
    21,130.74/29,160.63 = 11,699.82/x
  3. Step 3: Cross multiply
    21,130.74x = 29,160.63 × 11,699.82
  4. Step 4: Simplify right side
    21,130.74x = 341,174,122.09
  5. Step 5: Solve for x
    x = 341,174,122.09/21,130.74
  6. Step 6: Final answer
    x = 16,145.87

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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.