Home / 20,885.07-28,821.43-11,453.70

Finding the Fourth Proportional to 20,885.07, 28,821.43 and 11,453.70

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Solution

The fourth proportional to 20,885.07, 28,821.43 and 11,453.70 is: 15,806.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.07 : 28,821.43 = 11,453.70 : x
  2. Step 2: Convert to fraction form
    20,885.07/28,821.43 = 11,453.70/x
  3. Step 3: Cross multiply
    20,885.07x = 28,821.43 × 11,453.70
  4. Step 4: Simplify right side
    20,885.07x = 330,111,840.05
  5. Step 5: Solve for x
    x = 330,111,840.05/20,885.07
  6. Step 6: Final answer
    x = 15,806.12

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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.