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Finding the Fourth Proportional to 21,249, 29,323.62 and 11,817.36

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Solution

The fourth proportional to 21,249, 29,323.62 and 11,817.36 is: 16,307.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,249 : 29,323.62 = 11,817.36 : x
  2. Step 2: Convert to fraction form
    21,249/29,323.62 = 11,817.36/x
  3. Step 3: Cross multiply
    21,249x = 29,323.62 × 11,817.36
  4. Step 4: Simplify right side
    21,249x = 346,527,774.04
  5. Step 5: Solve for x
    x = 346,527,774.04/21,249
  6. Step 6: Final answer
    x = 16,307.96

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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.