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Finding the Fourth Proportional to 8,365.47, 12,549.36 and 2,820.40

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Solution

The fourth proportional to 8,365.47, 12,549.36 and 2,820.40 is: 4,230.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,365.47 : 12,549.36 = 2,820.40 : x
  2. Step 2: Convert to fraction form
    8,365.47/12,549.36 = 2,820.40/x
  3. Step 3: Cross multiply
    8,365.47x = 12,549.36 × 2,820.40
  4. Step 4: Simplify right side
    8,365.47x = 35,394,178.28
  5. Step 5: Solve for x
    x = 35,394,178.28/8,365.47
  6. Step 6: Final answer
    x = 4,230.99

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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.