Home / 20,788.06-31,162.64-7,636.90

Finding the Fourth Proportional to 20,788.06, 31,162.64 and 7,636.90

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Solution

The fourth proportional to 20,788.06, 31,162.64 and 7,636.90 is: 11,448.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.06 : 31,162.64 = 7,636.90 : x
  2. Step 2: Convert to fraction form
    20,788.06/31,162.64 = 7,636.90/x
  3. Step 3: Cross multiply
    20,788.06x = 31,162.64 × 7,636.90
  4. Step 4: Simplify right side
    20,788.06x = 237,985,809.60
  5. Step 5: Solve for x
    x = 237,985,809.60/20,788.06
  6. Step 6: Final answer
    x = 11,448.20

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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.