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Finding the Fourth Proportional to 5,655.83, 7,805.51 and 3,138.19

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Solution

The fourth proportional to 5,655.83, 7,805.51 and 3,138.19 is: 4,330.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,655.83 : 7,805.51 = 3,138.19 : x
  2. Step 2: Convert to fraction form
    5,655.83/7,805.51 = 3,138.19/x
  3. Step 3: Cross multiply
    5,655.83x = 7,805.51 × 3,138.19
  4. Step 4: Simplify right side
    5,655.83x = 24,495,211.55
  5. Step 5: Solve for x
    x = 24,495,211.55/5,655.83
  6. Step 6: Final answer
    x = 4,330.97

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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.