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Finding the Fourth Proportional to 7,809.55, 10,776.78 and 4,452.64

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Solution

The fourth proportional to 7,809.55, 10,776.78 and 4,452.64 is: 6,144.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,809.55 : 10,776.78 = 4,452.64 : x
  2. Step 2: Convert to fraction form
    7,809.55/10,776.78 = 4,452.64/x
  3. Step 3: Cross multiply
    7,809.55x = 10,776.78 × 4,452.64
  4. Step 4: Simplify right side
    7,809.55x = 47,985,094.76
  5. Step 5: Solve for x
    x = 47,985,094.76/7,809.55
  6. Step 6: Final answer
    x = 6,144.41

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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.