Home / 21,512.72-29,699.70-13,965.86

Finding the Fourth Proportional to 21,512.72, 29,699.70 and 13,965.86

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Solution

The fourth proportional to 21,512.72, 29,699.70 and 13,965.86 is: 19,280.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.72 : 29,699.70 = 13,965.86 : x
  2. Step 2: Convert to fraction form
    21,512.72/29,699.70 = 13,965.86/x
  3. Step 3: Cross multiply
    21,512.72x = 29,699.70 × 13,965.86
  4. Step 4: Simplify right side
    21,512.72x = 414,781,852.24
  5. Step 5: Solve for x
    x = 414,781,852.24/21,512.72
  6. Step 6: Final answer
    x = 19,280.77

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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.