Home / 21,580.93-29,781.68-12,630.14

Finding the Fourth Proportional to 21,580.93, 29,781.68 and 12,630.14

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Solution

The fourth proportional to 21,580.93, 29,781.68 and 12,630.14 is: 17,429.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,580.93 : 29,781.68 = 12,630.14 : x
  2. Step 2: Convert to fraction form
    21,580.93/29,781.68 = 12,630.14/x
  3. Step 3: Cross multiply
    21,580.93x = 29,781.68 × 12,630.14
  4. Step 4: Simplify right side
    21,580.93x = 376,146,787.84
  5. Step 5: Solve for x
    x = 376,146,787.84/21,580.93
  6. Step 6: Final answer
    x = 17,429.59

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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.