Home / 21,372.68-29,495.40-12,877.47

Finding the Fourth Proportional to 21,372.68, 29,495.40 and 12,877.47

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Solution

The fourth proportional to 21,372.68, 29,495.40 and 12,877.47 is: 17,771.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,372.68 : 29,495.40 = 12,877.47 : x
  2. Step 2: Convert to fraction form
    21,372.68/29,495.40 = 12,877.47/x
  3. Step 3: Cross multiply
    21,372.68x = 29,495.40 × 12,877.47
  4. Step 4: Simplify right side
    21,372.68x = 379,826,128.64
  5. Step 5: Solve for x
    x = 379,826,128.64/21,372.68
  6. Step 6: Final answer
    x = 17,771.57

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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.