Home / 21,036.74-28,986.80-14,310.68

Finding the Fourth Proportional to 21,036.74, 28,986.80 and 14,310.68

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Solution

The fourth proportional to 21,036.74, 28,986.80 and 14,310.68 is: 19,718.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,036.74 : 28,986.80 = 14,310.68 : x
  2. Step 2: Convert to fraction form
    21,036.74/28,986.80 = 14,310.68/x
  3. Step 3: Cross multiply
    21,036.74x = 28,986.80 × 14,310.68
  4. Step 4: Simplify right side
    21,036.74x = 414,820,819.02
  5. Step 5: Solve for x
    x = 414,820,819.02/21,036.74
  6. Step 6: Final answer
    x = 19,718.87

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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.