Home / 20,776.16-31,164.22-9,690.60

Finding the Fourth Proportional to 20,776.16, 31,164.22 and 9,690.60

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Solution

The fourth proportional to 20,776.16, 31,164.22 and 9,690.60 is: 14,535.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.16 : 31,164.22 = 9,690.60 : x
  2. Step 2: Convert to fraction form
    20,776.16/31,164.22 = 9,690.60/x
  3. Step 3: Cross multiply
    20,776.16x = 31,164.22 × 9,690.60
  4. Step 4: Simplify right side
    20,776.16x = 301,999,990.33
  5. Step 5: Solve for x
    x = 301,999,990.33/20,776.16
  6. Step 6: Final answer
    x = 14,535.89

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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.