Home / 20,887.16-28,824.21-11,455.70

Finding the Fourth Proportional to 20,887.16, 28,824.21 and 11,455.70

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Solution

The fourth proportional to 20,887.16, 28,824.21 and 11,455.70 is: 15,808.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.16 : 28,824.21 = 11,455.70 : x
  2. Step 2: Convert to fraction form
    20,887.16/28,824.21 = 11,455.70/x
  3. Step 3: Cross multiply
    20,887.16x = 28,824.21 × 11,455.70
  4. Step 4: Simplify right side
    20,887.16x = 330,201,358.38
  5. Step 5: Solve for x
    x = 330,201,358.38/20,887.16
  6. Step 6: Final answer
    x = 15,808.82

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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.