Home / 21,539.84-29,721.76-12,106.58

Finding the Fourth Proportional to 21,539.84, 29,721.76 and 12,106.58

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Solution

The fourth proportional to 21,539.84, 29,721.76 and 12,106.58 is: 16,705.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,539.84 : 29,721.76 = 12,106.58 : x
  2. Step 2: Convert to fraction form
    21,539.84/29,721.76 = 12,106.58/x
  3. Step 3: Cross multiply
    21,539.84x = 29,721.76 × 12,106.58
  4. Step 4: Simplify right side
    21,539.84x = 359,828,865.18
  5. Step 5: Solve for x
    x = 359,828,865.18/21,539.84
  6. Step 6: Final answer
    x = 16,705.27

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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.