Home / 21,484.85-29,649.34-12,987.44

Finding the Fourth Proportional to 21,484.85, 29,649.34 and 12,987.44

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Solution

The fourth proportional to 21,484.85, 29,649.34 and 12,987.44 is: 17,922.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,484.85 : 29,649.34 = 12,987.44 : x
  2. Step 2: Convert to fraction form
    21,484.85/29,649.34 = 12,987.44/x
  3. Step 3: Cross multiply
    21,484.85x = 29,649.34 × 12,987.44
  4. Step 4: Simplify right side
    21,484.85x = 385,069,003.46
  5. Step 5: Solve for x
    x = 385,069,003.46/21,484.85
  6. Step 6: Final answer
    x = 17,922.82

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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.