Home / 20,996.90-28,977.06-11,565.48

Finding the Fourth Proportional to 20,996.90, 28,977.06 and 11,565.48

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Solution

The fourth proportional to 20,996.90, 28,977.06 and 11,565.48 is: 15,961.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.90 : 28,977.06 = 11,565.48 : x
  2. Step 2: Convert to fraction form
    20,996.90/28,977.06 = 11,565.48/x
  3. Step 3: Cross multiply
    20,996.90x = 28,977.06 × 11,565.48
  4. Step 4: Simplify right side
    20,996.90x = 335,133,607.89
  5. Step 5: Solve for x
    x = 335,133,607.89/20,996.90
  6. Step 6: Final answer
    x = 15,961.10

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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.