Home / 28,490.10-42,743.78-20,186.18

Finding the Fourth Proportional to 28,490.10, 42,743.78 and 20,186.18

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Solution

The fourth proportional to 28,490.10, 42,743.78 and 20,186.18 is: 30,285.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.10 : 42,743.78 = 20,186.18 : x
  2. Step 2: Convert to fraction form
    28,490.10/42,743.78 = 20,186.18/x
  3. Step 3: Cross multiply
    28,490.10x = 42,743.78 × 20,186.18
  4. Step 4: Simplify right side
    28,490.10x = 862,833,636.96
  5. Step 5: Solve for x
    x = 862,833,636.96/28,490.10
  6. Step 6: Final answer
    x = 30,285.38

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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.