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Finding the Fourth Proportional to 6,985.20, 10,477.80 and 4,907.55

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Solution

The fourth proportional to 6,985.20, 10,477.80 and 4,907.55 is: 7,361.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,985.20 : 10,477.80 = 4,907.55 : x
  2. Step 2: Convert to fraction form
    6,985.20/10,477.80 = 4,907.55/x
  3. Step 3: Cross multiply
    6,985.20x = 10,477.80 × 4,907.55
  4. Step 4: Simplify right side
    6,985.20x = 51,420,327.39
  5. Step 5: Solve for x
    x = 51,420,327.39/6,985.20
  6. Step 6: Final answer
    x = 7,361.33

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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.