Home / 21,013.72-28,998.84-11,454.16

Finding the Fourth Proportional to 21,013.72, 28,998.84 and 11,454.16

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Solution

The fourth proportional to 21,013.72, 28,998.84 and 11,454.16 is: 15,806.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.72 : 28,998.84 = 11,454.16 : x
  2. Step 2: Convert to fraction form
    21,013.72/28,998.84 = 11,454.16/x
  3. Step 3: Cross multiply
    21,013.72x = 28,998.84 × 11,454.16
  4. Step 4: Simplify right side
    21,013.72x = 332,157,353.17
  5. Step 5: Solve for x
    x = 332,157,353.17/21,013.72
  6. Step 6: Final answer
    x = 15,806.69

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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.