Home / 20,742.96-28,624.98-11,311.50

Finding the Fourth Proportional to 20,742.96, 28,624.98 and 11,311.50

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Solution

The fourth proportional to 20,742.96, 28,624.98 and 11,311.50 is: 15,609.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.96 : 28,624.98 = 11,311.50 : x
  2. Step 2: Convert to fraction form
    20,742.96/28,624.98 = 11,311.50/x
  3. Step 3: Cross multiply
    20,742.96x = 28,624.98 × 11,311.50
  4. Step 4: Simplify right side
    20,742.96x = 323,791,461.27
  5. Step 5: Solve for x
    x = 323,791,461.27/20,742.96
  6. Step 6: Final answer
    x = 15,609.70

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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.