Home / 7,728.52-10,665.30-4,191.70

Finding the Fourth Proportional to 7,728.52, 10,665.30 and 4,191.70

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Solution

The fourth proportional to 7,728.52, 10,665.30 and 4,191.70 is: 5,784.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,728.52 : 10,665.30 = 4,191.70 : x
  2. Step 2: Convert to fraction form
    7,728.52/10,665.30 = 4,191.70/x
  3. Step 3: Cross multiply
    7,728.52x = 10,665.30 × 4,191.70
  4. Step 4: Simplify right side
    7,728.52x = 44,705,738.01
  5. Step 5: Solve for x
    x = 44,705,738.01/7,728.52
  6. Step 6: Final answer
    x = 5,784.51

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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.