Home / 20,968.41-31,451.81-7,820.76

Finding the Fourth Proportional to 20,968.41, 31,451.81 and 7,820.76

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Solution

The fourth proportional to 20,968.41, 31,451.81 and 7,820.76 is: 11,730.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.41 : 31,451.81 = 7,820.76 : x
  2. Step 2: Convert to fraction form
    20,968.41/31,451.81 = 7,820.76/x
  3. Step 3: Cross multiply
    20,968.41x = 31,451.81 × 7,820.76
  4. Step 4: Simplify right side
    20,968.41x = 245,977,018.47
  5. Step 5: Solve for x
    x = 245,977,018.47/20,968.41
  6. Step 6: Final answer
    x = 11,730.84

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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.