Home / 8,720.70-12,029.82-5,528.16

Finding the Fourth Proportional to 8,720.70, 12,029.82 and 5,528.16

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Solution

The fourth proportional to 8,720.70, 12,029.82 and 5,528.16 is: 7,625.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.70 : 12,029.82 = 5,528.16 : x
  2. Step 2: Convert to fraction form
    8,720.70/12,029.82 = 5,528.16/x
  3. Step 3: Cross multiply
    8,720.70x = 12,029.82 × 5,528.16
  4. Step 4: Simplify right side
    8,720.70x = 66,502,769.73
  5. Step 5: Solve for x
    x = 66,502,769.73/8,720.70
  6. Step 6: Final answer
    x = 7,625.85

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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.