Home / 18,997.20-28,475.28-9,130.32

Finding the Fourth Proportional to 18,997.20, 28,475.28 and 9,130.32

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Solution

The fourth proportional to 18,997.20, 28,475.28 and 9,130.32 is: 13,685.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,997.20 : 28,475.28 = 9,130.32 : x
  2. Step 2: Convert to fraction form
    18,997.20/28,475.28 = 9,130.32/x
  3. Step 3: Cross multiply
    18,997.20x = 28,475.28 × 9,130.32
  4. Step 4: Simplify right side
    18,997.20x = 259,988,418.49
  5. Step 5: Solve for x
    x = 259,988,418.49/18,997.20
  6. Step 6: Final answer
    x = 13,685.62

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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.