Home / 21,648.33-29,879.15-12,700.53

Finding the Fourth Proportional to 21,648.33, 29,879.15 and 12,700.53

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Solution

The fourth proportional to 21,648.33, 29,879.15 and 12,700.53 is: 17,529.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,648.33 : 29,879.15 = 12,700.53 : x
  2. Step 2: Convert to fraction form
    21,648.33/29,879.15 = 12,700.53/x
  3. Step 3: Cross multiply
    21,648.33x = 29,879.15 × 12,700.53
  4. Step 4: Simplify right side
    21,648.33x = 379,480,977.45
  5. Step 5: Solve for x
    x = 379,480,977.45/21,648.33
  6. Step 6: Final answer
    x = 17,529.34

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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.