Home / 21,348.40-29,459.57-11,917.56

Finding the Fourth Proportional to 21,348.40, 29,459.57 and 11,917.56

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Solution

The fourth proportional to 21,348.40, 29,459.57 and 11,917.56 is: 16,445.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,348.40 : 29,459.57 = 11,917.56 : x
  2. Step 2: Convert to fraction form
    21,348.40/29,459.57 = 11,917.56/x
  3. Step 3: Cross multiply
    21,348.40x = 29,459.57 × 11,917.56
  4. Step 4: Simplify right side
    21,348.40x = 351,086,193.05
  5. Step 5: Solve for x
    x = 351,086,193.05/21,348.40
  6. Step 6: Final answer
    x = 16,445.55

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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.