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Finding the Fourth Proportional to 21,293.84, 29,386.88 and 11,863.84

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Solution

The fourth proportional to 21,293.84, 29,386.88 and 11,863.84 is: 16,372.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,293.84 : 29,386.88 = 11,863.84 : x
  2. Step 2: Convert to fraction form
    21,293.84/29,386.88 = 11,863.84/x
  3. Step 3: Cross multiply
    21,293.84x = 29,386.88 × 11,863.84
  4. Step 4: Simplify right side
    21,293.84x = 348,641,242.42
  5. Step 5: Solve for x
    x = 348,641,242.42/21,293.84
  6. Step 6: Final answer
    x = 16,372.87

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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.