Home / 21,438.84-29,581.74-12,938.52

Finding the Fourth Proportional to 21,438.84, 29,581.74 and 12,938.52

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Solution

The fourth proportional to 21,438.84, 29,581.74 and 12,938.52 is: 17,852.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.84 : 29,581.74 = 12,938.52 : x
  2. Step 2: Convert to fraction form
    21,438.84/29,581.74 = 12,938.52/x
  3. Step 3: Cross multiply
    21,438.84x = 29,581.74 × 12,938.52
  4. Step 4: Simplify right side
    21,438.84x = 382,743,934.62
  5. Step 5: Solve for x
    x = 382,743,934.62/21,438.84
  6. Step 6: Final answer
    x = 17,852.83

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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.