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Finding the Fourth Proportional to 8,907.20, 13,371.60 and 8,842.40

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Solution

The fourth proportional to 8,907.20, 13,371.60 and 8,842.40 is: 13,274.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,907.20 : 13,371.60 = 8,842.40 : x
  2. Step 2: Convert to fraction form
    8,907.20/13,371.60 = 8,842.40/x
  3. Step 3: Cross multiply
    8,907.20x = 13,371.60 × 8,842.40
  4. Step 4: Simplify right side
    8,907.20x = 118,237,035.84
  5. Step 5: Solve for x
    x = 118,237,035.84/8,907.20
  6. Step 6: Final answer
    x = 13,274.32

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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.