Home / 21,013.76-28,998.88-11,454.16

Finding the Fourth Proportional to 21,013.76, 28,998.88 and 11,454.16

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Solution

The fourth proportional to 21,013.76, 28,998.88 and 11,454.16 is: 15,806.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.76 : 28,998.88 = 11,454.16 : x
  2. Step 2: Convert to fraction form
    21,013.76/28,998.88 = 11,454.16/x
  3. Step 3: Cross multiply
    21,013.76x = 28,998.88 × 11,454.16
  4. Step 4: Simplify right side
    21,013.76x = 332,157,811.34
  5. Step 5: Solve for x
    x = 332,157,811.34/21,013.76
  6. Step 6: Final answer
    x = 15,806.68

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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.