Home / 28,431.10-42,654.38-8,709.22

Finding the Fourth Proportional to 28,431.10, 42,654.38 and 8,709.22

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Solution

The fourth proportional to 28,431.10, 42,654.38 and 8,709.22 is: 13,066.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.10 : 42,654.38 = 8,709.22 : x
  2. Step 2: Convert to fraction form
    28,431.10/42,654.38 = 8,709.22/x
  3. Step 3: Cross multiply
    28,431.10x = 42,654.38 × 8,709.22
  4. Step 4: Simplify right side
    28,431.10x = 371,486,379.38
  5. Step 5: Solve for x
    x = 371,486,379.38/28,431.10
  6. Step 6: Final answer
    x = 13,066.20

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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.