Home / 20,774.09-31,135.21-10,388.81

Finding the Fourth Proportional to 20,774.09, 31,135.21 and 10,388.81

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Solution

The fourth proportional to 20,774.09, 31,135.21 and 10,388.81 is: 15,570.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.09 : 31,135.21 = 10,388.81 : x
  2. Step 2: Convert to fraction form
    20,774.09/31,135.21 = 10,388.81/x
  3. Step 3: Cross multiply
    20,774.09x = 31,135.21 × 10,388.81
  4. Step 4: Simplify right side
    20,774.09x = 323,457,781.00
  5. Step 5: Solve for x
    x = 323,457,781.00/20,774.09
  6. Step 6: Final answer
    x = 15,570.25

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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.