Home / 28,628.56-42,969.28-20,631.64

Finding the Fourth Proportional to 28,628.56, 42,969.28 and 20,631.64

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Solution

The fourth proportional to 28,628.56, 42,969.28 and 20,631.64 is: 30,966.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,628.56 : 42,969.28 = 20,631.64 : x
  2. Step 2: Convert to fraction form
    28,628.56/42,969.28 = 20,631.64/x
  3. Step 3: Cross multiply
    28,628.56x = 42,969.28 × 20,631.64
  4. Step 4: Simplify right side
    28,628.56x = 886,526,716.02
  5. Step 5: Solve for x
    x = 886,526,716.02/28,628.56
  6. Step 6: Final answer
    x = 30,966.51

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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.