Home / 20,956.50-28,920.06-11,525.76

Finding the Fourth Proportional to 20,956.50, 28,920.06 and 11,525.76

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Solution

The fourth proportional to 20,956.50, 28,920.06 and 11,525.76 is: 15,905.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.50 : 28,920.06 = 11,525.76 : x
  2. Step 2: Convert to fraction form
    20,956.50/28,920.06 = 11,525.76/x
  3. Step 3: Cross multiply
    20,956.50x = 28,920.06 × 11,525.76
  4. Step 4: Simplify right side
    20,956.50x = 333,325,670.75
  5. Step 5: Solve for x
    x = 333,325,670.75/20,956.50
  6. Step 6: Final answer
    x = 15,905.60

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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.