Home / 20,740.09-31,110.16-5,157.72

Finding the Fourth Proportional to 20,740.09, 31,110.16 and 5,157.72

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Solution

The fourth proportional to 20,740.09, 31,110.16 and 5,157.72 is: 7,736.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.09 : 31,110.16 = 5,157.72 : x
  2. Step 2: Convert to fraction form
    20,740.09/31,110.16 = 5,157.72/x
  3. Step 3: Cross multiply
    20,740.09x = 31,110.16 × 5,157.72
  4. Step 4: Simplify right side
    20,740.09x = 160,457,325.99
  5. Step 5: Solve for x
    x = 160,457,325.99/20,740.09
  6. Step 6: Final answer
    x = 7,736.58

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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.