Home / 21,130.66-29,160.84-11,699.56

Finding the Fourth Proportional to 21,130.66, 29,160.84 and 11,699.56

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Solution

The fourth proportional to 21,130.66, 29,160.84 and 11,699.56 is: 16,145.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.66 : 29,160.84 = 11,699.56 : x
  2. Step 2: Convert to fraction form
    21,130.66/29,160.84 = 11,699.56/x
  3. Step 3: Cross multiply
    21,130.66x = 29,160.84 × 11,699.56
  4. Step 4: Simplify right side
    21,130.66x = 341,168,997.23
  5. Step 5: Solve for x
    x = 341,168,997.23/21,130.66
  6. Step 6: Final answer
    x = 16,145.69

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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.