Home / 20,276.07-30,418.20-7,129.46

Finding the Fourth Proportional to 20,276.07, 30,418.20 and 7,129.46

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Solution

The fourth proportional to 20,276.07, 30,418.20 and 7,129.46 is: 10,695.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,276.07 : 30,418.20 = 7,129.46 : x
  2. Step 2: Convert to fraction form
    20,276.07/30,418.20 = 7,129.46/x
  3. Step 3: Cross multiply
    20,276.07x = 30,418.20 × 7,129.46
  4. Step 4: Simplify right side
    20,276.07x = 216,865,416.22
  5. Step 5: Solve for x
    x = 216,865,416.22/20,276.07
  6. Step 6: Final answer
    x = 10,695.64

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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.