Home / 21,402.75-29,535.91-11,971.31

Finding the Fourth Proportional to 21,402.75, 29,535.91 and 11,971.31

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Solution

The fourth proportional to 21,402.75, 29,535.91 and 11,971.31 is: 16,520.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,402.75 : 29,535.91 = 11,971.31 : x
  2. Step 2: Convert to fraction form
    21,402.75/29,535.91 = 11,971.31/x
  3. Step 3: Cross multiply
    21,402.75x = 29,535.91 × 11,971.31
  4. Step 4: Simplify right side
    21,402.75x = 353,583,534.74
  5. Step 5: Solve for x
    x = 353,583,534.74/21,402.75
  6. Step 6: Final answer
    x = 16,520.47

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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.