Home / 20,820.96-31,204.62-7,657.74

Finding the Fourth Proportional to 20,820.96, 31,204.62 and 7,657.74

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Solution

The fourth proportional to 20,820.96, 31,204.62 and 7,657.74 is: 11,476.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.96 : 31,204.62 = 7,657.74 : x
  2. Step 2: Convert to fraction form
    20,820.96/31,204.62 = 7,657.74/x
  3. Step 3: Cross multiply
    20,820.96x = 31,204.62 × 7,657.74
  4. Step 4: Simplify right side
    20,820.96x = 238,956,866.76
  5. Step 5: Solve for x
    x = 238,956,866.76/20,820.96
  6. Step 6: Final answer
    x = 11,476.75

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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.