Home / 21,876.48-30,186.72-12,315.16

Finding the Fourth Proportional to 21,876.48, 30,186.72 and 12,315.16

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Solution

The fourth proportional to 21,876.48, 30,186.72 and 12,315.16 is: 16,993.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,876.48 : 30,186.72 = 12,315.16 : x
  2. Step 2: Convert to fraction form
    21,876.48/30,186.72 = 12,315.16/x
  3. Step 3: Cross multiply
    21,876.48x = 30,186.72 × 12,315.16
  4. Step 4: Simplify right side
    21,876.48x = 371,754,286.68
  5. Step 5: Solve for x
    x = 371,754,286.68/21,876.48
  6. Step 6: Final answer
    x = 16,993.33

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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.