Home / 20,992.04-28,969.40-11,432.21

Finding the Fourth Proportional to 20,992.04, 28,969.40 and 11,432.21

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Solution

The fourth proportional to 20,992.04, 28,969.40 and 11,432.21 is: 15,776.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.04 : 28,969.40 = 11,432.21 : x
  2. Step 2: Convert to fraction form
    20,992.04/28,969.40 = 11,432.21/x
  3. Step 3: Cross multiply
    20,992.04x = 28,969.40 × 11,432.21
  4. Step 4: Simplify right side
    20,992.04x = 331,184,062.37
  5. Step 5: Solve for x
    x = 331,184,062.37/20,992.04
  6. Step 6: Final answer
    x = 15,776.65

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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.