Home / 21,429.27-29,572.79-11,997.81

Finding the Fourth Proportional to 21,429.27, 29,572.79 and 11,997.81

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Solution

The fourth proportional to 21,429.27, 29,572.79 and 11,997.81 is: 16,557.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.27 : 29,572.79 = 11,997.81 : x
  2. Step 2: Convert to fraction form
    21,429.27/29,572.79 = 11,997.81/x
  3. Step 3: Cross multiply
    21,429.27x = 29,572.79 × 11,997.81
  4. Step 4: Simplify right side
    21,429.27x = 354,808,655.60
  5. Step 5: Solve for x
    x = 354,808,655.60/21,429.27
  6. Step 6: Final answer
    x = 16,557.20

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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.