Home / 20,730.26-31,095.12-5,147.75

Finding the Fourth Proportional to 20,730.26, 31,095.12 and 5,147.75

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Solution

The fourth proportional to 20,730.26, 31,095.12 and 5,147.75 is: 7,721.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.26 : 31,095.12 = 5,147.75 : x
  2. Step 2: Convert to fraction form
    20,730.26/31,095.12 = 5,147.75/x
  3. Step 3: Cross multiply
    20,730.26x = 31,095.12 × 5,147.75
  4. Step 4: Simplify right side
    20,730.26x = 160,069,903.98
  5. Step 5: Solve for x
    x = 160,069,903.98/20,730.26
  6. Step 6: Final answer
    x = 7,721.56

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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.