Home / 20,405.43-30,608.10-7,258.32

Finding the Fourth Proportional to 20,405.43, 30,608.10 and 7,258.32

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Solution

The fourth proportional to 20,405.43, 30,608.10 and 7,258.32 is: 10,887.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.43 : 30,608.10 = 7,258.32 : x
  2. Step 2: Convert to fraction form
    20,405.43/30,608.10 = 7,258.32/x
  3. Step 3: Cross multiply
    20,405.43x = 30,608.10 × 7,258.32
  4. Step 4: Simplify right side
    20,405.43x = 222,163,384.39
  5. Step 5: Solve for x
    x = 222,163,384.39/20,405.43
  6. Step 6: Final answer
    x = 10,887.46

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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.