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Finding the Fourth Proportional to 7,666.80, 11,478.30 and 4,725.30

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Solution

The fourth proportional to 7,666.80, 11,478.30 and 4,725.30 is: 7,074.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,666.80 : 11,478.30 = 4,725.30 : x
  2. Step 2: Convert to fraction form
    7,666.80/11,478.30 = 4,725.30/x
  3. Step 3: Cross multiply
    7,666.80x = 11,478.30 × 4,725.30
  4. Step 4: Simplify right side
    7,666.80x = 54,238,410.99
  5. Step 5: Solve for x
    x = 54,238,410.99/7,666.80
  6. Step 6: Final answer
    x = 7,074.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.