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Finding the Fourth Proportional to 21,291, 29,381.58 and 11,860.17

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Solution

The fourth proportional to 21,291, 29,381.58 and 11,860.17 is: 16,367.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291 : 29,381.58 = 11,860.17 : x
  2. Step 2: Convert to fraction form
    21,291/29,381.58 = 11,860.17/x
  3. Step 3: Cross multiply
    21,291x = 29,381.58 × 11,860.17
  4. Step 4: Simplify right side
    21,291x = 348,470,533.67
  5. Step 5: Solve for x
    x = 348,470,533.67/21,291
  6. Step 6: Final answer
    x = 16,367.03

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1.5x scale

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.