Home / 21,031.25-29,015.85-13,481.74

Finding the Fourth Proportional to 21,031.25, 29,015.85 and 13,481.74

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Solution

The fourth proportional to 21,031.25, 29,015.85 and 13,481.74 is: 18,600.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.25 : 29,015.85 = 13,481.74 : x
  2. Step 2: Convert to fraction form
    21,031.25/29,015.85 = 13,481.74/x
  3. Step 3: Cross multiply
    21,031.25x = 29,015.85 × 13,481.74
  4. Step 4: Simplify right side
    21,031.25x = 391,184,232.41
  5. Step 5: Solve for x
    x = 391,184,232.41/21,031.25
  6. Step 6: Final answer
    x = 18,600.15

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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.