Home / 21,407.28-29,543.16-11,976

Finding the Fourth Proportional to 21,407.28, 29,543.16 and 11,976

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Solution

The fourth proportional to 21,407.28, 29,543.16 and 11,976 is: 16,527.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,407.28 : 29,543.16 = 11,976 : x
  2. Step 2: Convert to fraction form
    21,407.28/29,543.16 = 11,976/x
  3. Step 3: Cross multiply
    21,407.28x = 29,543.16 × 11,976
  4. Step 4: Simplify right side
    21,407.28x = 353,808,884.16
  5. Step 5: Solve for x
    x = 353,808,884.16/21,407.28
  6. Step 6: Final answer
    x = 16,527.50

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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.