Home / 21,215.64-29,278.08-11,784

Finding the Fourth Proportional to 21,215.64, 29,278.08 and 11,784

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Solution

The fourth proportional to 21,215.64, 29,278.08 and 11,784 is: 16,262.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.64 : 29,278.08 = 11,784 : x
  2. Step 2: Convert to fraction form
    21,215.64/29,278.08 = 11,784/x
  3. Step 3: Cross multiply
    21,215.64x = 29,278.08 × 11,784
  4. Step 4: Simplify right side
    21,215.64x = 345,012,894.72
  5. Step 5: Solve for x
    x = 345,012,894.72/21,215.64
  6. Step 6: Final answer
    x = 16,262.20

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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.