Home / 20,892.54-28,810.71-12,513.90

Finding the Fourth Proportional to 20,892.54, 28,810.71 and 12,513.90

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Solution

The fourth proportional to 20,892.54, 28,810.71 and 12,513.90 is: 17,256.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,892.54 : 28,810.71 = 12,513.90 : x
  2. Step 2: Convert to fraction form
    20,892.54/28,810.71 = 12,513.90/x
  3. Step 3: Cross multiply
    20,892.54x = 28,810.71 × 12,513.90
  4. Step 4: Simplify right side
    20,892.54x = 360,534,343.87
  5. Step 5: Solve for x
    x = 360,534,343.87/20,892.54
  6. Step 6: Final answer
    x = 17,256.61

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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.