Home / 20,693.13-31,039.78-5,110.75

Finding the Fourth Proportional to 20,693.13, 31,039.78 and 5,110.75

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Solution

The fourth proportional to 20,693.13, 31,039.78 and 5,110.75 is: 7,666.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,693.13 : 31,039.78 = 5,110.75 : x
  2. Step 2: Convert to fraction form
    20,693.13/31,039.78 = 5,110.75/x
  3. Step 3: Cross multiply
    20,693.13x = 31,039.78 × 5,110.75
  4. Step 4: Simplify right side
    20,693.13x = 158,636,555.64
  5. Step 5: Solve for x
    x = 158,636,555.64/20,693.13
  6. Step 6: Final answer
    x = 7,666.15

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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.