Home / 21,360.64-29,478.27-11,929.81

Finding the Fourth Proportional to 21,360.64, 29,478.27 and 11,929.81

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Solution

The fourth proportional to 21,360.64, 29,478.27 and 11,929.81 is: 16,463.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,360.64 : 29,478.27 = 11,929.81 : x
  2. Step 2: Convert to fraction form
    21,360.64/29,478.27 = 11,929.81/x
  3. Step 3: Cross multiply
    21,360.64x = 29,478.27 × 11,929.81
  4. Step 4: Simplify right side
    21,360.64x = 351,670,160.23
  5. Step 5: Solve for x
    x = 351,670,160.23/21,360.64
  6. Step 6: Final answer
    x = 16,463.47

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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.