Home / 21,645.53-29,878.77-12,700.53

Finding the Fourth Proportional to 21,645.53, 29,878.77 and 12,700.53

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Solution

The fourth proportional to 21,645.53, 29,878.77 and 12,700.53 is: 17,531.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,645.53 : 29,878.77 = 12,700.53 : x
  2. Step 2: Convert to fraction form
    21,645.53/29,878.77 = 12,700.53/x
  3. Step 3: Cross multiply
    21,645.53x = 29,878.77 × 12,700.53
  4. Step 4: Simplify right side
    21,645.53x = 379,476,262.38
  5. Step 5: Solve for x
    x = 379,476,262.38/21,645.53
  6. Step 6: Final answer
    x = 17,531.39

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1.5x scale

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.