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Finding the Fourth Proportional to 9,907.20, 14,855.40 and 4,057.20

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Solution

The fourth proportional to 9,907.20, 14,855.40 and 4,057.20 is: 6,083.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,907.20 : 14,855.40 = 4,057.20 : x
  2. Step 2: Convert to fraction form
    9,907.20/14,855.40 = 4,057.20/x
  3. Step 3: Cross multiply
    9,907.20x = 14,855.40 × 4,057.20
  4. Step 4: Simplify right side
    9,907.20x = 60,271,328.88
  5. Step 5: Solve for x
    x = 60,271,328.88/9,907.20
  6. Step 6: Final answer
    x = 6,083.59

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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.