Home / 8,921.40-12,310.82-5,142.03

Finding the Fourth Proportional to 8,921.40, 12,310.82 and 5,142.03

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Solution

The fourth proportional to 8,921.40, 12,310.82 and 5,142.03 is: 7,095.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.40 : 12,310.82 = 5,142.03 : x
  2. Step 2: Convert to fraction form
    8,921.40/12,310.82 = 5,142.03/x
  3. Step 3: Cross multiply
    8,921.40x = 12,310.82 × 5,142.03
  4. Step 4: Simplify right side
    8,921.40x = 63,302,580.05
  5. Step 5: Solve for x
    x = 63,302,580.05/8,921.40
  6. Step 6: Final answer
    x = 7,095.59

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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.