Home / 21,197.20-31,781.40-8,047.60

Finding the Fourth Proportional to 21,197.20, 31,781.40 and 8,047.60

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Solution

The fourth proportional to 21,197.20, 31,781.40 and 8,047.60 is: 12,065.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,197.20 : 31,781.40 = 8,047.60 : x
  2. Step 2: Convert to fraction form
    21,197.20/31,781.40 = 8,047.60/x
  3. Step 3: Cross multiply
    21,197.20x = 31,781.40 × 8,047.60
  4. Step 4: Simplify right side
    21,197.20x = 255,763,994.64
  5. Step 5: Solve for x
    x = 255,763,994.64/21,197.20
  6. Step 6: Final answer
    x = 12,065.93

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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.