Home / 20,858.40-31,290.32-6,813.52

Finding the Fourth Proportional to 20,858.40, 31,290.32 and 6,813.52

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Solution

The fourth proportional to 20,858.40, 31,290.32 and 6,813.52 is: 10,221.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.40 : 31,290.32 = 6,813.52 : x
  2. Step 2: Convert to fraction form
    20,858.40/31,290.32 = 6,813.52/x
  3. Step 3: Cross multiply
    20,858.40x = 31,290.32 × 6,813.52
  4. Step 4: Simplify right side
    20,858.40x = 213,197,221.13
  5. Step 5: Solve for x
    x = 213,197,221.13/20,858.40
  6. Step 6: Final answer
    x = 10,221.17

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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.