Home / 21,672.40-29,878.26-13,710.64

Finding the Fourth Proportional to 21,672.40, 29,878.26 and 13,710.64

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Solution

The fourth proportional to 21,672.40, 29,878.26 and 13,710.64 is: 18,901.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,672.40 : 29,878.26 = 13,710.64 : x
  2. Step 2: Convert to fraction form
    21,672.40/29,878.26 = 13,710.64/x
  3. Step 3: Cross multiply
    21,672.40x = 29,878.26 × 13,710.64
  4. Step 4: Simplify right side
    21,672.40x = 409,650,066.69
  5. Step 5: Solve for x
    x = 409,650,066.69/21,672.40
  6. Step 6: Final answer
    x = 18,901.92

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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.