Home / 20,343.76-30,528.48-8,656.96

Finding the Fourth Proportional to 20,343.76, 30,528.48 and 8,656.96

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Solution

The fourth proportional to 20,343.76, 30,528.48 and 8,656.96 is: 12,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.76 : 30,528.48 = 8,656.96 : x
  2. Step 2: Convert to fraction form
    20,343.76/30,528.48 = 8,656.96/x
  3. Step 3: Cross multiply
    20,343.76x = 30,528.48 × 8,656.96
  4. Step 4: Simplify right side
    20,343.76x = 264,283,830.22
  5. Step 5: Solve for x
    x = 264,283,830.22/20,343.76
  6. Step 6: Final answer
    x = 12,990.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.