Home / 21,361-29,478.18-11,929.64

Finding the Fourth Proportional to 21,361, 29,478.18 and 11,929.64

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Solution

The fourth proportional to 21,361, 29,478.18 and 11,929.64 is: 16,462.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,361 : 29,478.18 = 11,929.64 : x
  2. Step 2: Convert to fraction form
    21,361/29,478.18 = 11,929.64/x
  3. Step 3: Cross multiply
    21,361x = 29,478.18 × 11,929.64
  4. Step 4: Simplify right side
    21,361x = 351,664,075.26
  5. Step 5: Solve for x
    x = 351,664,075.26/21,361
  6. Step 6: Final answer
    x = 16,462.90

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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.