Home / 30,661.60-42,301.92-20,057.28

Finding the Fourth Proportional to 30,661.60, 42,301.92 and 20,057.28

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Solution

The fourth proportional to 30,661.60, 42,301.92 and 20,057.28 is: 27,671.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,661.60 : 42,301.92 = 20,057.28 : x
  2. Step 2: Convert to fraction form
    30,661.60/42,301.92 = 20,057.28/x
  3. Step 3: Cross multiply
    30,661.60x = 42,301.92 × 20,057.28
  4. Step 4: Simplify right side
    30,661.60x = 848,461,453.98
  5. Step 5: Solve for x
    x = 848,461,453.98/30,661.60
  6. Step 6: Final answer
    x = 27,671.79

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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.