Home / 20,900.21-31,360.56-9,807.80

Finding the Fourth Proportional to 20,900.21, 31,360.56 and 9,807.80

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Solution

The fourth proportional to 20,900.21, 31,360.56 and 9,807.80 is: 14,716.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.21 : 31,360.56 = 9,807.80 : x
  2. Step 2: Convert to fraction form
    20,900.21/31,360.56 = 9,807.80/x
  3. Step 3: Cross multiply
    20,900.21x = 31,360.56 × 9,807.80
  4. Step 4: Simplify right side
    20,900.21x = 307,577,943.57
  5. Step 5: Solve for x
    x = 307,577,943.57/20,900.21
  6. Step 6: Final answer
    x = 14,716.50

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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.