Home / 21,406.80-29,542.08-11,975.28

Finding the Fourth Proportional to 21,406.80, 29,542.08 and 11,975.28

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Solution

The fourth proportional to 21,406.80, 29,542.08 and 11,975.28 is: 16,526.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,406.80 : 29,542.08 = 11,975.28 : x
  2. Step 2: Convert to fraction form
    21,406.80/29,542.08 = 11,975.28/x
  3. Step 3: Cross multiply
    21,406.80x = 29,542.08 × 11,975.28
  4. Step 4: Simplify right side
    21,406.80x = 353,774,679.78
  5. Step 5: Solve for x
    x = 353,774,679.78/21,406.80
  6. Step 6: Final answer
    x = 16,526.28

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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.