Home / 20,775.79-31,154.46-5,981.25

Finding the Fourth Proportional to 20,775.79, 31,154.46 and 5,981.25

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Solution

The fourth proportional to 20,775.79, 31,154.46 and 5,981.25 is: 8,969.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.79 : 31,154.46 = 5,981.25 : x
  2. Step 2: Convert to fraction form
    20,775.79/31,154.46 = 5,981.25/x
  3. Step 3: Cross multiply
    20,775.79x = 31,154.46 × 5,981.25
  4. Step 4: Simplify right side
    20,775.79x = 186,342,613.88
  5. Step 5: Solve for x
    x = 186,342,613.88/20,775.79
  6. Step 6: Final answer
    x = 8,969.22

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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.