Home / 20,905.22-31,357.70-5,110.32

Finding the Fourth Proportional to 20,905.22, 31,357.70 and 5,110.32

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Solution

The fourth proportional to 20,905.22, 31,357.70 and 5,110.32 is: 7,665.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.22 : 31,357.70 = 5,110.32 : x
  2. Step 2: Convert to fraction form
    20,905.22/31,357.70 = 5,110.32/x
  3. Step 3: Cross multiply
    20,905.22x = 31,357.70 × 5,110.32
  4. Step 4: Simplify right side
    20,905.22x = 160,247,881.46
  5. Step 5: Solve for x
    x = 160,247,881.46/20,905.22
  6. Step 6: Final answer
    x = 7,665.45

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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.