Home / 21,334.07-29,443.64-12,840.61

Finding the Fourth Proportional to 21,334.07, 29,443.64 and 12,840.61

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Solution

The fourth proportional to 21,334.07, 29,443.64 and 12,840.61 is: 17,721.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,334.07 : 29,443.64 = 12,840.61 : x
  2. Step 2: Convert to fraction form
    21,334.07/29,443.64 = 12,840.61/x
  3. Step 3: Cross multiply
    21,334.07x = 29,443.64 × 12,840.61
  4. Step 4: Simplify right side
    21,334.07x = 378,074,298.22
  5. Step 5: Solve for x
    x = 378,074,298.22/21,334.07
  6. Step 6: Final answer
    x = 17,721.62

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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.