Home / 7,899.35-10,902.80-5,387.45

Finding the Fourth Proportional to 7,899.35, 10,902.80 and 5,387.45

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Solution

The fourth proportional to 7,899.35, 10,902.80 and 5,387.45 is: 7,435.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,899.35 : 10,902.80 = 5,387.45 : x
  2. Step 2: Convert to fraction form
    7,899.35/10,902.80 = 5,387.45/x
  3. Step 3: Cross multiply
    7,899.35x = 10,902.80 × 5,387.45
  4. Step 4: Simplify right side
    7,899.35x = 58,738,310.14
  5. Step 5: Solve for x
    x = 58,738,310.14/7,899.35
  6. Step 6: Final answer
    x = 7,435.85

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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.