Home / 21,429.63-29,572.70-11,998.35

Finding the Fourth Proportional to 21,429.63, 29,572.70 and 11,998.35

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Solution

The fourth proportional to 21,429.63, 29,572.70 and 11,998.35 is: 16,557.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.63 : 29,572.70 = 11,998.35 : x
  2. Step 2: Convert to fraction form
    21,429.63/29,572.70 = 11,998.35/x
  3. Step 3: Cross multiply
    21,429.63x = 29,572.70 × 11,998.35
  4. Step 4: Simplify right side
    21,429.63x = 354,823,545.05
  5. Step 5: Solve for x
    x = 354,823,545.05/21,429.63
  6. Step 6: Final answer
    x = 16,557.61

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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.