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Finding the Fourth Proportional to 7,840.87, 10,819.87 and 4,303.87

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Solution

The fourth proportional to 7,840.87, 10,819.87 and 4,303.87 is: 5,939.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,840.87 : 10,819.87 = 4,303.87 : x
  2. Step 2: Convert to fraction form
    7,840.87/10,819.87 = 4,303.87/x
  3. Step 3: Cross multiply
    7,840.87x = 10,819.87 × 4,303.87
  4. Step 4: Simplify right side
    7,840.87x = 46,567,313.90
  5. Step 5: Solve for x
    x = 46,567,313.90/7,840.87
  6. Step 6: Final answer
    x = 5,939.05

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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.