Home / 31,102.48-42,928.38-19,769.77

Finding the Fourth Proportional to 31,102.48, 42,928.38 and 19,769.77

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Solution

The fourth proportional to 31,102.48, 42,928.38 and 19,769.77 is: 27,286.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,102.48 : 42,928.38 = 19,769.77 : x
  2. Step 2: Convert to fraction form
    31,102.48/42,928.38 = 19,769.77/x
  3. Step 3: Cross multiply
    31,102.48x = 42,928.38 × 19,769.77
  4. Step 4: Simplify right side
    31,102.48x = 848,684,199.07
  5. Step 5: Solve for x
    x = 848,684,199.07/31,102.48
  6. Step 6: Final answer
    x = 27,286.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.