Home / 20,275.52-30,418.80-7,137.12

Finding the Fourth Proportional to 20,275.52, 30,418.80 and 7,137.12

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Solution

The fourth proportional to 20,275.52, 30,418.80 and 7,137.12 is: 10,707.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,275.52 : 30,418.80 = 7,137.12 : x
  2. Step 2: Convert to fraction form
    20,275.52/30,418.80 = 7,137.12/x
  3. Step 3: Cross multiply
    20,275.52x = 30,418.80 × 7,137.12
  4. Step 4: Simplify right side
    20,275.52x = 217,102,625.86
  5. Step 5: Solve for x
    x = 217,102,625.86/20,275.52
  6. Step 6: Final answer
    x = 10,707.62

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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.