Home / 8,721.87-12,030.08-5,736.75

Finding the Fourth Proportional to 8,721.87, 12,030.08 and 5,736.75

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Solution

The fourth proportional to 8,721.87, 12,030.08 and 5,736.75 is: 7,912.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.87 : 12,030.08 = 5,736.75 : x
  2. Step 2: Convert to fraction form
    8,721.87/12,030.08 = 5,736.75/x
  3. Step 3: Cross multiply
    8,721.87x = 12,030.08 × 5,736.75
  4. Step 4: Simplify right side
    8,721.87x = 69,013,561.44
  5. Step 5: Solve for x
    x = 69,013,561.44/8,721.87
  6. Step 6: Final answer
    x = 7,912.70

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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.