Home / 21,407.25-29,542.02-11,978.04

Finding the Fourth Proportional to 21,407.25, 29,542.02 and 11,978.04

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Solution

The fourth proportional to 21,407.25, 29,542.02 and 11,978.04 is: 16,529.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,407.25 : 29,542.02 = 11,978.04 : x
  2. Step 2: Convert to fraction form
    21,407.25/29,542.02 = 11,978.04/x
  3. Step 3: Cross multiply
    21,407.25x = 29,542.02 × 11,978.04
  4. Step 4: Simplify right side
    21,407.25x = 353,855,497.24
  5. Step 5: Solve for x
    x = 353,855,497.24/21,407.25
  6. Step 6: Final answer
    x = 16,529.70

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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.