Home / 21,407.80-29,543.46-11,976.28

Finding the Fourth Proportional to 21,407.80, 29,543.46 and 11,976.28

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Solution

The fourth proportional to 21,407.80, 29,543.46 and 11,976.28 is: 16,527.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,407.80 : 29,543.46 = 11,976.28 : x
  2. Step 2: Convert to fraction form
    21,407.80/29,543.46 = 11,976.28/x
  3. Step 3: Cross multiply
    21,407.80x = 29,543.46 × 11,976.28
  4. Step 4: Simplify right side
    21,407.80x = 353,820,749.13
  5. Step 5: Solve for x
    x = 353,820,749.13/21,407.80
  6. Step 6: Final answer
    x = 16,527.66

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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.