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Finding the Fourth Proportional to 5,659.71, 7,809.17 and 3,421.55

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Solution

The fourth proportional to 5,659.71, 7,809.17 and 3,421.55 is: 4,720.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,659.71 : 7,809.17 = 3,421.55 : x
  2. Step 2: Convert to fraction form
    5,659.71/7,809.17 = 3,421.55/x
  3. Step 3: Cross multiply
    5,659.71x = 7,809.17 × 3,421.55
  4. Step 4: Simplify right side
    5,659.71x = 26,719,409.46
  5. Step 5: Solve for x
    x = 26,719,409.46/5,659.71
  6. Step 6: Final answer
    x = 4,720.99

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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.