Home / 21,287.60-29,377.32-12,338

Finding the Fourth Proportional to 21,287.60, 29,377.32 and 12,338

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Solution

The fourth proportional to 21,287.60, 29,377.32 and 12,338 is: 17,026.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.60 : 29,377.32 = 12,338 : x
  2. Step 2: Convert to fraction form
    21,287.60/29,377.32 = 12,338/x
  3. Step 3: Cross multiply
    21,287.60x = 29,377.32 × 12,338
  4. Step 4: Simplify right side
    21,287.60x = 362,457,374.16
  5. Step 5: Solve for x
    x = 362,457,374.16/21,287.60
  6. Step 6: Final answer
    x = 17,026.69

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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.