Home / 21,348.96-29,451.36-13,387.20

Finding the Fourth Proportional to 21,348.96, 29,451.36 and 13,387.20

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Solution

The fourth proportional to 21,348.96, 29,451.36 and 13,387.20 is: 18,467.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,348.96 : 29,451.36 = 13,387.20 : x
  2. Step 2: Convert to fraction form
    21,348.96/29,451.36 = 13,387.20/x
  3. Step 3: Cross multiply
    21,348.96x = 29,451.36 × 13,387.20
  4. Step 4: Simplify right side
    21,348.96x = 394,271,246.59
  5. Step 5: Solve for x
    x = 394,271,246.59/21,348.96
  6. Step 6: Final answer
    x = 18,467.94

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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.