Home / 20,405.28-30,613.64-7,258.98

Finding the Fourth Proportional to 20,405.28, 30,613.64 and 7,258.98

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Solution

The fourth proportional to 20,405.28, 30,613.64 and 7,258.98 is: 10,890.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.28 : 30,613.64 = 7,258.98 : x
  2. Step 2: Convert to fraction form
    20,405.28/30,613.64 = 7,258.98/x
  3. Step 3: Cross multiply
    20,405.28x = 30,613.64 × 7,258.98
  4. Step 4: Simplify right side
    20,405.28x = 222,223,764.19
  5. Step 5: Solve for x
    x = 222,223,764.19/20,405.28
  6. Step 6: Final answer
    x = 10,890.50

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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.