Home / 20,887.20-28,823.96-11,812.42

Finding the Fourth Proportional to 20,887.20, 28,823.96 and 11,812.42

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Solution

The fourth proportional to 20,887.20, 28,823.96 and 11,812.42 is: 16,300.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.20 : 28,823.96 = 11,812.42 : x
  2. Step 2: Convert to fraction form
    20,887.20/28,823.96 = 11,812.42/x
  3. Step 3: Cross multiply
    20,887.20x = 28,823.96 × 11,812.42
  4. Step 4: Simplify right side
    20,887.20x = 340,480,721.58
  5. Step 5: Solve for x
    x = 340,480,721.58/20,887.20
  6. Step 6: Final answer
    x = 16,300.93

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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.