Home / 21,361.19-29,478.42-11,929.76

Finding the Fourth Proportional to 21,361.19, 29,478.42 and 11,929.76

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Solution

The fourth proportional to 21,361.19, 29,478.42 and 11,929.76 is: 16,463.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,361.19 : 29,478.42 = 11,929.76 : x
  2. Step 2: Convert to fraction form
    21,361.19/29,478.42 = 11,929.76/x
  3. Step 3: Cross multiply
    21,361.19x = 29,478.42 × 11,929.76
  4. Step 4: Simplify right side
    21,361.19x = 351,670,475.78
  5. Step 5: Solve for x
    x = 351,670,475.78/21,361.19
  6. Step 6: Final answer
    x = 16,463.06

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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.