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Finding the Fourth Proportional to 14,221, 21,341.22 and 4,987

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Solution

The fourth proportional to 14,221, 21,341.22 and 4,987 is: 7,483.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,221 : 21,341.22 = 4,987 : x
  2. Step 2: Convert to fraction form
    14,221/21,341.22 = 4,987/x
  3. Step 3: Cross multiply
    14,221x = 21,341.22 × 4,987
  4. Step 4: Simplify right side
    14,221x = 106,428,664.14
  5. Step 5: Solve for x
    x = 106,428,664.14/14,221
  6. Step 6: Final answer
    x = 7,483.91

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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.