Home / 21,264.89-31,886.69-12,383.16

Finding the Fourth Proportional to 21,264.89, 31,886.69 and 12,383.16

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Solution

The fourth proportional to 21,264.89, 31,886.69 and 12,383.16 is: 18,568.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,264.89 : 31,886.69 = 12,383.16 : x
  2. Step 2: Convert to fraction form
    21,264.89/31,886.69 = 12,383.16/x
  3. Step 3: Cross multiply
    21,264.89x = 31,886.69 × 12,383.16
  4. Step 4: Simplify right side
    21,264.89x = 394,857,922.22
  5. Step 5: Solve for x
    x = 394,857,922.22/21,264.89
  6. Step 6: Final answer
    x = 18,568.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.