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Finding the Fourth Proportional to 7,809.71, 10,777.40 and 4,272.92

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Solution

The fourth proportional to 7,809.71, 10,777.40 and 4,272.92 is: 5,896.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,809.71 : 10,777.40 = 4,272.92 : x
  2. Step 2: Convert to fraction form
    7,809.71/10,777.40 = 4,272.92/x
  3. Step 3: Cross multiply
    7,809.71x = 10,777.40 × 4,272.92
  4. Step 4: Simplify right side
    7,809.71x = 46,050,892.76
  5. Step 5: Solve for x
    x = 46,050,892.76/7,809.71
  6. Step 6: Final answer
    x = 5,896.62

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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.