Home / 28,480.02-42,695.70-20,133.78

Finding the Fourth Proportional to 28,480.02, 42,695.70 and 20,133.78

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Solution

The fourth proportional to 28,480.02, 42,695.70 and 20,133.78 is: 30,183.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.02 : 42,695.70 = 20,133.78 : x
  2. Step 2: Convert to fraction form
    28,480.02/42,695.70 = 20,133.78/x
  3. Step 3: Cross multiply
    28,480.02x = 42,695.70 × 20,133.78
  4. Step 4: Simplify right side
    28,480.02x = 859,625,830.75
  5. Step 5: Solve for x
    x = 859,625,830.75/28,480.02
  6. Step 6: Final answer
    x = 30,183.47

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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.