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Finding the Fourth Proportional to 8,560.40, 12,842.40 and 4,859.60

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Solution

The fourth proportional to 8,560.40, 12,842.40 and 4,859.60 is: 7,290.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,560.40 : 12,842.40 = 4,859.60 : x
  2. Step 2: Convert to fraction form
    8,560.40/12,842.40 = 4,859.60/x
  3. Step 3: Cross multiply
    8,560.40x = 12,842.40 × 4,859.60
  4. Step 4: Simplify right side
    8,560.40x = 62,408,927.04
  5. Step 5: Solve for x
    x = 62,408,927.04/8,560.40
  6. Step 6: Final answer
    x = 7,290.42

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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.