Home / 21,135.12-29,166.66-12,750

Finding the Fourth Proportional to 21,135.12, 29,166.66 and 12,750

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Solution

The fourth proportional to 21,135.12, 29,166.66 and 12,750 is: 17,595.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.12 : 29,166.66 = 12,750 : x
  2. Step 2: Convert to fraction form
    21,135.12/29,166.66 = 12,750/x
  3. Step 3: Cross multiply
    21,135.12x = 29,166.66 × 12,750
  4. Step 4: Simplify right side
    21,135.12x = 371,874,915
  5. Step 5: Solve for x
    x = 371,874,915/21,135.12
  6. Step 6: Final answer
    x = 17,595.12

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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.