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Finding the Fourth Proportional to 14,221.93, 21,347.93 and 7,987.27

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Solution

The fourth proportional to 14,221.93, 21,347.93 and 7,987.27 is: 11,989.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,221.93 : 21,347.93 = 7,987.27 : x
  2. Step 2: Convert to fraction form
    14,221.93/21,347.93 = 7,987.27/x
  3. Step 3: Cross multiply
    14,221.93x = 21,347.93 × 7,987.27
  4. Step 4: Simplify right side
    14,221.93x = 170,511,640.91
  5. Step 5: Solve for x
    x = 170,511,640.91/14,221.93
  6. Step 6: Final answer
    x = 11,989.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.