Home / 20,992.40-28,969.32-11,560.76

Finding the Fourth Proportional to 20,992.40, 28,969.32 and 11,560.76

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Solution

The fourth proportional to 20,992.40, 28,969.32 and 11,560.76 is: 15,953.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.40 : 28,969.32 = 11,560.76 : x
  2. Step 2: Convert to fraction form
    20,992.40/28,969.32 = 11,560.76/x
  3. Step 3: Cross multiply
    20,992.40x = 28,969.32 × 11,560.76
  4. Step 4: Simplify right side
    20,992.40x = 334,907,355.88
  5. Step 5: Solve for x
    x = 334,907,355.88/20,992.40
  6. Step 6: Final answer
    x = 15,953.74

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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.