Home / 28,181.89-38,891.01-15,435.10

Finding the Fourth Proportional to 28,181.89, 38,891.01 and 15,435.10

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Solution

The fourth proportional to 28,181.89, 38,891.01 and 15,435.10 is: 21,300.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,181.89 : 38,891.01 = 15,435.10 : x
  2. Step 2: Convert to fraction form
    28,181.89/38,891.01 = 15,435.10/x
  3. Step 3: Cross multiply
    28,181.89x = 38,891.01 × 15,435.10
  4. Step 4: Simplify right side
    28,181.89x = 600,286,628.45
  5. Step 5: Solve for x
    x = 600,286,628.45/28,181.89
  6. Step 6: Final answer
    x = 21,300.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.