Home / 20,420.37-30,631.70-7,272.74

Finding the Fourth Proportional to 20,420.37, 30,631.70 and 7,272.74

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Solution

The fourth proportional to 20,420.37, 30,631.70 and 7,272.74 is: 10,909.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.37 : 30,631.70 = 7,272.74 : x
  2. Step 2: Convert to fraction form
    20,420.37/30,631.70 = 7,272.74/x
  3. Step 3: Cross multiply
    20,420.37x = 30,631.70 × 7,272.74
  4. Step 4: Simplify right side
    20,420.37x = 222,776,200.34
  5. Step 5: Solve for x
    x = 222,776,200.34/20,420.37
  6. Step 6: Final answer
    x = 10,909.51

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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.