Home / 20,132.78-30,199.23-6,985.15

Finding the Fourth Proportional to 20,132.78, 30,199.23 and 6,985.15

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Solution

The fourth proportional to 20,132.78, 30,199.23 and 6,985.15 is: 10,477.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,132.78 : 30,199.23 = 6,985.15 : x
  2. Step 2: Convert to fraction form
    20,132.78/30,199.23 = 6,985.15/x
  3. Step 3: Cross multiply
    20,132.78x = 30,199.23 × 6,985.15
  4. Step 4: Simplify right side
    20,132.78x = 210,946,151.43
  5. Step 5: Solve for x
    x = 210,946,151.43/20,132.78
  6. Step 6: Final answer
    x = 10,477.75

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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.