Home / 21,341.09-29,447.81-12,387.17

Finding the Fourth Proportional to 21,341.09, 29,447.81 and 12,387.17

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Solution

The fourth proportional to 21,341.09, 29,447.81 and 12,387.17 is: 17,092.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,341.09 : 29,447.81 = 12,387.17 : x
  2. Step 2: Convert to fraction form
    21,341.09/29,447.81 = 12,387.17/x
  3. Step 3: Cross multiply
    21,341.09x = 29,447.81 × 12,387.17
  4. Step 4: Simplify right side
    21,341.09x = 364,774,966.66
  5. Step 5: Solve for x
    x = 364,774,966.66/21,341.09
  6. Step 6: Final answer
    x = 17,092.61

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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.