Home / 28,485.66-42,728.74-18,687.08

Finding the Fourth Proportional to 28,485.66, 42,728.74 and 18,687.08

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Solution

The fourth proportional to 28,485.66, 42,728.74 and 18,687.08 is: 28,030.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.66 : 42,728.74 = 18,687.08 : x
  2. Step 2: Convert to fraction form
    28,485.66/42,728.74 = 18,687.08/x
  3. Step 3: Cross multiply
    28,485.66x = 42,728.74 × 18,687.08
  4. Step 4: Simplify right side
    28,485.66x = 798,475,382.68
  5. Step 5: Solve for x
    x = 798,475,382.68/28,485.66
  6. Step 6: Final answer
    x = 28,030.78

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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.