Home / 20,830.40-31,258.24-10,976.64

Finding the Fourth Proportional to 20,830.40, 31,258.24 and 10,976.64

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Solution

The fourth proportional to 20,830.40, 31,258.24 and 10,976.64 is: 16,471.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.40 : 31,258.24 = 10,976.64 : x
  2. Step 2: Convert to fraction form
    20,830.40/31,258.24 = 10,976.64/x
  3. Step 3: Cross multiply
    20,830.40x = 31,258.24 × 10,976.64
  4. Step 4: Simplify right side
    20,830.40x = 343,110,447.51
  5. Step 5: Solve for x
    x = 343,110,447.51/20,830.40
  6. Step 6: Final answer
    x = 16,471.62

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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.