Home / 21,827.13-30,116.77-12,871.36

Finding the Fourth Proportional to 21,827.13, 30,116.77 and 12,871.36

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Solution

The fourth proportional to 21,827.13, 30,116.77 and 12,871.36 is: 17,759.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,827.13 : 30,116.77 = 12,871.36 : x
  2. Step 2: Convert to fraction form
    21,827.13/30,116.77 = 12,871.36/x
  3. Step 3: Cross multiply
    21,827.13x = 30,116.77 × 12,871.36
  4. Step 4: Simplify right side
    21,827.13x = 387,643,788.71
  5. Step 5: Solve for x
    x = 387,643,788.71/21,827.13
  6. Step 6: Final answer
    x = 17,759.72

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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.