Home / 20,638.86-28,481.93-11,686.11

Finding the Fourth Proportional to 20,638.86, 28,481.93 and 11,686.11

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Solution

The fourth proportional to 20,638.86, 28,481.93 and 11,686.11 is: 16,127.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.86 : 28,481.93 = 11,686.11 : x
  2. Step 2: Convert to fraction form
    20,638.86/28,481.93 = 11,686.11/x
  3. Step 3: Cross multiply
    20,638.86x = 28,481.93 × 11,686.11
  4. Step 4: Simplify right side
    20,638.86x = 332,842,966.99
  5. Step 5: Solve for x
    x = 332,842,966.99/20,638.86
  6. Step 6: Final answer
    x = 16,127.00

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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.